The height of the tower is 2358.3 feet
What are trigonometric relations?
Trigonometry is the study of the relationships between the angles and the lengths of the sides of triangles
The six trigonometric functions are sin , cos , tan , cosec , sec and cot
Let the angle be θ , such that
sin θ = opposite / hypotenuse
cos θ = adjacent / hypotenuse
tan θ = opposite / adjacent
tan θ = sin θ / cos θ
cosec θ = 1/sin θ
sec θ = 1/cos θ
cot θ = 1/tan θ
Given data ,
Let the height of the tower be = A
Let the base of the tower be at a distance of = 500 feet
Now , the angle of elevation is θ = 78°
The height of David's view = 6 feet above
So , the total height of the tower be = A + height of David's eyes
Now , A right angle triangle is formed between the tower, the angle of elevation of David's eyes and his distance from the tower
And , the opposite side = A
Adjacent side = 500 feet
So , from the trigonometric relations
tan θ = opposite side / adjacent side
tan θ = A / 500
Multiply by 500 on both sides , we get
A = tan θ x 500
Substituting the value for θ
A = tan 78° x 500
A = 4.7046 x 500
A = 2352.3 feet
Now , the total height of the tower = A + height of David's eyes
= 2352.3 + 6
= 2358.3 feet
Hence , The height of the tower is 2358.3 feet
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The equation of line u is y–3=7(x–5). Parallel to line u is line v, which passes through the point (1,9). What is the equation of line v?
Answer:
y - 9 = 7(x - 1)
Step-by-step explanation:
The given equation is in Point Slope Form: y - y₁ = m(x - x₁)
m is the slope, and parallel lines have the same slope (7)
x₁ and y₁ are the coordinates of a point on the line
The length of a rectangle is 8 inches more than it’s width. It’s area is 308 square inches. The length is?
Answer:38.5
Step-by-step explanation:
308/8 =38.5
Answer: 8ft
Step-by-step explanation:
the length of the room is 8fr
Is the sum of 3.04 and √20 rational or irrational? Explain.
Answer:
Irrational
Step-by-step explanation:
A rational number can be expressed as p/q where p and q are integers
3.04 is rational since it can be expressed as 304/100
√20 is not rational. √20 = √(4·5) = √4·√5 = 2√5
While 2 is a rational number, √5 is irrational since 5 is a prime number and square roots of primes are not rational
An irrational number multiplied by a rational number is irrational so √20 is irrational
An irrational number added to a rational number results in an irrational number.
So 3.04 + √20 is irrational
Your redecorating your bedroom, and you want to put in a dressing table. The wall where you want to put it measures 4.7m. There is also a cupboard door on this wall, which takes up 410mm. The dressing table you like is 123cm wide. Once you've bought the dressing table , how much space on the wall, do you have left, not including the cupboard doors? I need this working out in metres please.
Answer:
3.06 meters
Step-by-step explanation:
The first thing you want to do, since we are working with different units here, is find out how many centimeters make a meter... and so on.
1cm = 0.01m
1mm = 0.001m
123cm = 1.23m (Dressing table)
410mm = 0.41m (Cupboard door)
Now all we need to do is subtract.
We can add the two numbers together or (If you prefer) subtract separately.
1.23 + 0.41 = 1.64
Now subtract that number from the measurement of the wall:
4.7 - 1.64 = 3.06
The amount of space left is 3.06m.
Graph the equation.
y
=
−
4
(
x
+
2
)
2
−
1
y=−4(x+2)
2
−
Answer:
see instructions
Step-by-step explanation:
1. (x + 2) = 0 gives us x = -2 = x coordinate of vertex; and
the -1 at the end gives us the y coordinate.
Move the vertex of the parabola to the point (-2,-1)
2. The -4 in front of the (x+2)² gives the direction and stretch of the parabola. FROM the Vertex, position the other point Down 4 and Right 1 (at (1,-5)).
Adante begins to evaluate the expression 3 1/3x5 1/4using the steps below.
3 1/3 x5 1/4
(3 1/3x(5+1/4)
(3 1/(3+1/3)(1/4)
Step-by-step explanation:
Here you are the answer.
The variables a, b, c, and d are graphed on the number line shown.
Use the number you answer the questions in the chart
The correct values are;
⇒ a - d = - 2
⇒ c - a = 7
⇒ b - c = - 8
⇒ d - c = - 5
What is Number line?
Number line is a horizontal line where numbers are marked at equal intervals one after another form smaller to greater.
Given that;
The number line is shown in figure.
The values are,
a = - 3
b = - 4
c = 4
d = - 1
Now,
All the values are find as;
⇒ a - d = - 3 - (- 1)
= - 3 + 1
= - 2
⇒ c - a = 4 - (-3)
= 4 + 3
= 7
⇒ b - c = - 4 - 4
= - 8
⇒ d - c = - 1 - 4
= - 5
Thus, The correct values are;
⇒ a - d = - 2
⇒ c - a = 7
⇒ b - c = - 8
⇒ d - c = - 5
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Every day, Garrett's burrito stand uses 1 7/10 bags of tortillas. How many days will 8 1/2 bags of tortillas last?
Answer: 5 days.
Step-by-step explanation: To solve this problem, we first need to convert 1 7/10 bags of tortillas to a decimal number. We can do this by dividing the numerator of the fraction (7) by the denominator (10) and adding the result to the whole number (1) to get 1 + 7/10 = 1.7 bags of tortillas.
Next, we can divide the number of bags of tortillas that Garrett's burrito stand uses per day (1.7 bags) into the total number of bags of tortillas that are available (8.5 bags) to find out how many days the tortillas will last: 8.5 bags / 1.7 bags/day = 5 days
Therefore, the 8 1/2 bags of tortillas will last for 5 days.
my teacher is asking what is 4 cubed and the options are [tex]3^{3}[/tex] , [tex]3^{3}[/tex] > 12 , [tex]4^{3}[/tex] , and 3-4 please help !
11. Ms. Still is ordering pizza and breadsticks for a school pizza party and has a budget of no more than
$91. An order of breadsticks, x, costs $7 and a pepperoni pizza, y, costs $13.
a. Write a linear inequality that describes the situation.
b. Graph the situation. Label the axes.
c. Is (5, 5, 4) a solution to the inequality? Does this oved pair make sense for this situation? Explain.
The inequality that represents the situation given will be
7x + 13y ≤ 91.
What is inequality?
An inequality in mathematics depicts the connection between two values in an algebraic statement that are not equal. One of the two variables on the two sides of the inequality may be greater than, greater than or equal to, less than, or less than or equal to another value, according to inequality signals.
The inequality that represents the situation given will be 7x + 13y ≤ 91.
From the information given, Crawford is ordering pizzas and breadsticks for a school pizza party and has a budget of $91, but no more and an order of breadsticks costs $7 while a pepperoni pizza costs $13.
Therefore, the inequality that represents the situation given will be
7x + 13y ≤ 91.
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Factor the expression.
- 20a-35
The positive GCF of -20a and -35 is 5. Complete each equation with an expression or integer factor.
5x -4a=-20a
5× - 7 = - 35
The expression with 5 factored out is
Answer:
5(-4a -7) = -20a -35
Step-by-step explanation:
The perimeter of a triangle is 58 cm. The triangle is isosceles, but if its base were lengthened by 4 cm and each leg were shortened by 7 cm, then it would be equilateral. Find the base of the original
triangle.
A. 12 cm
B. 11 cm
C. 23 cm
D. 16 cm
The base of the original triangle is 12 centimetres.
How to find the base of the original triangle?A triangle is a polygon with three sides. The perimeter of a triangle is 58 cm. The triangle is isosceles.
An isosceles triangle is a triangle with 2 sides equal to each other and two angles equal to each other.
Therefore, let's find the base of the original triangle when the base were lengthened by 4 cm and each leg were shortened by 7 cm,
Hence,
let
x = length of legs
y = length of the base
Therefore,
2x + y = 58
Hence,
y + 4 = x - 7
x - y = 11
2x + y = 58
x - y = 11
3x = 69
x = 69 / 3
x = 23
-y = 11 - 23
-y = -12
y = 12
Therefore,
base of the original triangle = 12 cm
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how much does a basket of apples weigh
Answer:
42-48 pound" number.
Step-by-step explanation:
Jackson’s motorcycle gets 28 kilometers per liter. He drives 336 kilometers and gas is $1.43 per liter. Complete parts (a) and (b) below.
(A) how much does the gas used for the trip cost?
-round to the nearest cent as needed-
(B) how many miles per gallon does Jackson’s motorcycle get?
-round to the nearest cent as needed-
The gas for the Trip cost is $8.39
The amount of gas motorcycle needed is 12 Liter of gas.
What is Unitary Method?The unitary technique involves first determining the value of a single unit, followed by the value of the necessary number of units.
For example, Let's say Ram spends 36 Rs. for a dozen (12) bananas.
12 bananas will set you back 36 Rs. 1 banana costs 36 x 12 = 3 Rupees.
As a result, one banana costs three rupees. Let's say we need to calculate the price of 15 bananas.
This may be done as follows: 15 bananas cost 3 rupees each; 15 units cost 45 rupees.
Given:
Jackson’s motorcycle gets 28 kilometers per liter.
He drives 336 kilometers and gas is $1.43 per liter.
The amount of gas motorcycle needed
= 336/28
= 12 Liter of gas
and, The gas for the Trip cost = 12/1.43
= $8.39
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Is (x + 7) a factor of f(x) = x3 − 3x2 + 2x − 8? Explain your reasoning.
X + 7 is not a factor of [tex]x^{3}[/tex] -3[tex]x^{2}[/tex] +2x -8 because it gives a remainder when x + 7 divides it.
What is a remainder?The remainder is the portion of the dividend that cannot be fairly divided by the divisor. After dividing whole numbers to find the quotient, the part that is left is called the remainder.
to know if x + 7 is a factor, x = -7 when substituted should give 0 as a remainder otherwise it is not a factor.
By substituting x = -7 we have
[tex](-7)^{3}[/tex] [tex]-3(-7)^{2}[/tex] +2(-7) - 8 = -343 -147 -14 - 8 which is -512
Therefore x + 7 is not a factor of the function.
In conclusion x + 7 is not a factor of [tex]x^{3}[/tex] -3[tex]x^{2}[/tex] +2x -8
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Answer:
What he said!
Step-by-step explanation:
If 3(x + 5) + 2 = 5, what is the value of x?
Answer:
-4
Step-by-step explanation:
3x+15+2=5
3x=-15-2+5
3x=-12
x=-12/3
x=-4
Answer:
x=-4
Step-by-step explanation:
Given:
[tex]3(x+5)+2=5[/tex]
To find:
The value of x.
Explanation:
It is given that,
[tex]3(x+5)+2=5[/tex]
That implies,
[tex]3(x+5)+2=5\\3x+15+2=5\\3x+17=5\\3x=5-17\\3x=-12\\x=-\frac{12}{3} \\x=-4[/tex]
Hence, the value of x is -4.
What number represents 3,675,100,608 rounded to the nearest million?
The number 3,675,000,000 represents 3,675,100,608 rounded off to the nearest million.
Rounding off large numbers.When we round off large numbers, we consider the digit to the right of the number occupying the place value for which we are rounding off to. If the digit to the right is 4 or less, we round down (we leave the number we are rounding to), but if the digit is 5 or higher, we round up (we increase the digit we are rounding by 1). and thus round to the indicated place value.
From the question, we have the large number;
3,675,100,608
the digit 5 indicates the place value (million)
and the digit 1 is to the right and will be rounded down.
Therefore, the number 3,675,000,000 represents 3,675,100,608, rounded to the nearest million.
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You are a construction worker who is laying down concrete drainage pipes. Each pipe is 5 feet long and 3 inches thick, and has an outside diameter of 6.5 feet. You lay down 4 drainage pipes end to end.
At any given time, what is the volume of water that passes through the 4 drainage pipes at half capacity? Round the answer to the nearest tenth of a cubic foot.
141.3
165.8
282.6
306.6
565.2
Answer:
Volume = 282.6 ft.²
Step-by-step explanation:
Volume: V = πr²h
Step 1: The answer needs to be in cubic feet, so convert all units to feet
1. 3 ft./12 in. = 0.25 ft.
Step 2: Subtract 0.5 ft from 6.5 ft to find the actual diameter of the pipe that the water will be passing through
2. 6.5 ft. - 0.5 ft. = 6 ft.
Step 3: Plug 3 ft. (radius), 3.14 for π, and 5 ft for h
3. V = (3.14)(3 ft.)²(5 ft.)
Step 4: Solve for the V (volume)
4. V = (3.14)(9 ft.)(5 ft.) → V = (28.26)(5) → V = (28.26)(5) → V = 141.3 ft.²
Step 5: Divide 141.3 by 2, since we want half the capacity
5. 141.3 ft.²/2 = 70.65 ft.²
Step 6: Multiply 70.65 by 4 since we want the total volume of water passing through four pipes
6. 70.65 ft.² ∙ 4 = 282.6 ft.²
Old Navy had $940 worth of orders for shirts. The prices for the shirts were categorized by style: $10 for tank tops, $14 for graphic tees, and $22 for polos. The number of polos ordered was one more than half the number of graphic tees, and the number of graphic tees ordered was eight less than twice the number of tank tops. Determine the number of each type of shirt ordered.
The number of each type of shirt ordered are as follows;
number of graphic tees = 29number of tanks tops = 19number of polos = 15How to find the number of each type of shirt ordered?Old Navy had $940 worth of orders for shirts.
The prices for the shirts were categorized by style: $10 for tank tops, $14 for graphic tees, and $22 for polos.
The number of polos ordered was one more than half the number of graphic tees, and the number of graphic tees ordered was eight less than twice the number of tank tops.
let
x = number of graphic tees
Hence,
number of polos = 1 + 1 / 2 x
Number of tank tops = 1 / 2 x + 4
Therefore, the total
14x + 10(1 / 2 x + 4) + 22(1 + 1 / 2 x) = 940
14x + 5x + 40 + 22 + 11x = 940
30x + 62 = 940
30x = 878
x = 29.266667
x = 29
number of polos = 1 + 1 / 2 (29) ≈ 15
Number of tank tops = 1 / 2 (29) + 4 ≈ 19
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A bakery can make 640 bagels in 4 hours how many can it make in 8 hours and 6 hours.PLEASE HURRY UP THIS IS DUE IN 10 MINUTES <3333
Hello!
What does this problem want:
how many bagels in 8 hourshow many bagels in 6 hoursWhat we need to find: rate of bagels made per hour
[tex]\text{Rate}=\frac{\text{Total number of bagels}}{\text{Number of hours}} =\frac{640}{4} =160 \text{ bagels per hour}[/tex]
Thus
how many bagels in 8 hours8 * 160 = 1280 bagels
how many bagels in 6 hours6 * 160 = 960 bagels
Hope that helps!
Math Please help!!!!! Linear vs Exponential
Answer:
linearadditivelycommon differenceabout 240.12Step-by-step explanation:
Given the values in the table, you want to know if they represent a linear or exponential relation, along with the common difference or ratio, as applicable.
ChangesThe first attachment shows the differences and ratios between successive table values. Neither the differences nor the ratios are constant. The wide variation in ratios and the relatively smaller variation in differences suggests the table is best modeled by a linear function.
Changes when the function is linear are additive. That is, the function values have a common difference.
Common differenceThe average difference between table values is (949.92 -229.44)/3 = 240.16. A linear regression analysis gives a slope of 240.12 as the "best fit" to the table values.
You can see from the first attachment that the differences are not constant, so there isn't really a common difference. The difference is approximately 240.12.
__
Additional comment
The second attachment shows linear and an exponential regression applied to this data. The residuals are much smaller for the linear approximation.
The slope of the line (common difference) is estimated at 240.12 using the regression formula. This makes the mean square residuals a minimum. As we show above, this slope is different (slightly lower) than the slope of the line through the first and last data points.
solve 3x+1=-5 by graphing. then find the x- and y-intercepts
The graph of the equation is shown below
The x-intercept is -2
The y-intercept is undefined
Graph of linear equations and determining the interceptsFrom the question, we are to solve the equation by graphing and determine the x- and y-intercepts
The given equation is
3x + 1 = -5
To determine the x-intercepts, we will solve the equation
3x + 1 =-5
3x = -5 - 1
3x = -6
Divide both sides by 3
x = -2
Since, y is not defined in the equation, the y-intercept is undefined
The graph of the equation is shown below.
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Which ordered pairs in the form (x, y) are solutions to the equation
7x−5y=28?
Select each correct answer.
Responses
(7, 9)
Begin ordered pair 7 comma 9 end ordered pair
(4, 10)
Begin ordered pair4 comma 10 end ordered pair
(−1, −7)
Begin ordered pair negative 1 comma negative 7 end ordered pair
(−6, −14)
The ordered pair (-1, -7) is the solution to the equation 7x - 5y = 28.
Define solutions of linear equations.The collection of variable values in linear equations that yields all feasible solutions is referred to as the solution of a linear equation. In order to describe real-world issues, linear equations contain unknown values in the form of one or more variables. The collection of values for each variable in a system of linear equations is referred to as the solution set.
Consider the equation,
7x - 5y = 28
Now put the values from options, the pair values at which LHS = RHS that will be the solution to the equation.
Put x = 77, y = 9 in the equation
7(7) -5(9)
= 49 - 45
= 4
This is not a solution.
Put x =4, y= 10
7(4) - 5(10)= 28 - 50
= -32
This is not a solution.
Put x= -1, y = -7
7(-1) - 5 (-7)
= -7 + 35
= 28
So, this is the solution to the equation as LHS = RHS
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Answer:
C. the ordered pair (1.5, 10)
Step-by-step explanation:
30+ w =150 what does w equal?
[3x (4.6÷2)] +14.1 =
Answer:
21
Step-by-step explanation:
PEMDAS : Parenthesis, Exponent, Multiplication/Division, Addition/Subtraction.
First, we want to deal with the parenthesis within the parenthesis.
(4.6/2) = 2.3
Rewrite it into the equation.
[3 * 2.3] + 14.1 = ?
Now, do the work in the parenthesis again.
[6.9] + 14.1 = ?
There isn't anymore parenthesis, exponents, or multiplication/division, so we move onto addition now and add both terms.
6.9 + 14.1 = 21
? = 21
The answer is 21.
y=9.44x+84.182
is this function a good model for the data
Answer:
Step-by-step explanation:
443
Will give brainliest
50 points
Answer: D
Step-by-step explanation:
The parent function abs(x) is a V, similar to graph B.
When it is multiplied by a negative number then it reflects across the Y axis, and if the number is greater than 1, then the graph is horizontally compressed (like you're squishing the sides together, closer to each other). If the number is less than 1, either decimals or a fraction, then it is stretched (like you are pulling the sides away from each other and they are getting wider).
In this case you are multiplying abs(x) by 4, which is greater than 1 so it is compressed by a factor of 4, and then multiplying it by a negative, which reflects it across the y axis.
FIRST ANSWER WILL GET 100 PTS!
What mixed number is equivalent to 21 ÷ 4?
Answer:
Step-by-step explanation:
5 1/4
Answer:là
5
với số dư
1
.
5
1
4
Step-by-step explanation:
HELP ME OUT OMG THANKS
Answer: r = 12
Step-by-step explanation:
11 - 23 = 12
YOUR SO WELCOME!!! :D
During a test, 3 out of 100 cars selected at random were found to be defective. Use this ratio to estimate the number of defective cars if 1,500 cars are tested.
There are 45 defective cars if 1,500 cars are tested.
What is mean by Ratio?
A ratio indicates how many times one number contain in another number. The ratio of two number is written as x : y, which is equivalent to x/y. Where, x and y are individual amount of two quantities.
Given that;
During a test, 3 out of 100 cars selected at random were found to be defective.
Now,
Since, During a test, 3 out of 100 cars selected at random were found to be defective.
Let number of defective cars if 1,500 cars are tested = x
So, By definition of ratio, we get;
⇒ 3 / 100 = x / 1,500
Solve for x as;
⇒ 3 × 1500 / 100 = x
⇒ 3 × 15 = x
⇒ x = 45
Thus, There are 45 defective cars if 1,500 cars are tested.
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