D=u^2/2a
u=30.6 correct to 3 significant figures
a=5.2 correct to 2 significant figures

a) Calculate the upper bound for the value of D. Give your answer correct to 6 significant figures.

The lower bound for the value of D is 88.8860 correct to six significant figures.

b)
i) By considering bounds, write down the value of D to a suitable degree of accuracy.
ii) Give a reason to your answer

Answers

Answer 1

30.65^2/(2*5.15)=91.2061

d=91.2061

b)i)90

ii) Mathswatch is critical of anything apart from it's system so I dont know what the answer is for this one

Related Questions

mustafa is putting a sidewalk using two diffrent style bricks, one style brick is 8 inches long, and the other style brick is 6 inches long ,and he intends to use y of these. his sidewalk is to be 288 inches long write down an equation to represent the situation

Answers

Answer:

8y+6y=288

Step-by-step explanation:

8y+6y= 12y

12y=288

12y divide by 12 = 288 divided by 12 =

y=24

3y + 7 = x is this a direct proportion

Answers

Answer:

Step-by-step explanation:

if the ratio (yx) of two variables (x and y) is equal to a constant (k=yx) .in this case y is said to be directly proportional to x with proportionality constant k

Please help me find the area of this shape please!

Answers

i’m pretty sure it’s just 28

1/4 + 3 = ??
What’s the answer??

Answers

Answer:

3.25

Step-by-step explanation:

divide then add 3

Answer:

3 1/4 or 13/4

Step-by-step explanation:

Kayden is a teacher and takes home 100 papers to grade over the weekend. He can grade at a rate of 6 papers per hour. How many papers would Kayden have remaining to grade after working for 10 hours?

Answers

Answer:

Step-by-step explanation:

6 * 10 = 60 papers done and complete

100- 60 = 40

Answer:

40 papers will be remaining

Step-by-step explanation:

= As,It take 1 hour to grade 6 papers

= 1 -6

= 10-?

= by cross multiplying we get 60 papers

= 100 - 60

= 40 papers

Thank you

Mean
Vasquez read 5 books in January, 8 books in February,
4books in March, and 7 books in April. What is the
average number of books Vasquez reads per month?

Answers

Answer: six per month

Answer:

Step By Step Solution:

[tex]5 + 8 + 4 + 7 = x\\ 13 + 4 + 7 = x \\ 17 + 7 = 24 \\ x = 24 \\ 24 \div 4 = 6[/tex]

Help me lol please and thank you

Answers

well the opposite of addition is subtraction
to find n move 27 to the other side which makes it negative
15+ (-27) =-12

Mel has a net annual income of $53 246 after 21% of her income is C withdrawn for tax purposes. What was her gross income?

Answers

Answer:

$67400

Step-by-step explanation:

Given that :

Net income = 53246

Deduction (tax purposes) % = 21%

Gross income = net income + deduction

Let gross income = x

x = 53246 + 21% of x

x = 53246 + 0.21x

x - 0.21x = 53246

0.79x = 53246

x = 53246 / 0.79

x = 67400

Element X decays radioactively with a half life of 9 minutes. If there are 860
grams of Element X, how long, to the nearest tenth of a minute, would it take
the element to decay to 94 grams?

Answers

Answer:28.7 minutes

Step-by-step explanation:

Please help with number 1? It’s urgent!!!!

Answers

Answer:

Step-by-step explanation:

how much feet is in a mile

Answers

Answer:

5280

Step-by-step explanation:

Answer:

There are 5,280 feet in a mile.

I need help due in a Hour

Answers

answer:

50 yd

explanation:

Which graph below is a tree graph? Place a pointer on your answer.

Answers

Answer:

Step-by-step explanation:

BRAINIEST PLLLLLLSSSSSS

Find the X & Y value

Answers

Answer:

Step-by-step explanation:

x = 72°

y = 61°

Quick help please!!!

Answers

Answer:

Step-by-step explanation:

this isnt highschool, u are dum

determine an equation and the radius for the circle that has its centre at the origin (0,0) passes through the point A 4-3

Answers

Given:

The center of the circle is at (0,0).

The circle passes through the point A(4,-3).

To find:

The radius and the equation of the circle.

Solution:

Distance formula:

[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

The radius of the circle is the distance between the points (0,0) and (4,-3).

[tex]r=\sqrt{(4-0)^2+(-3-0)^2}[/tex]

[tex]r=\sqrt{(4)^2+(-3)^2}[/tex]

[tex]r=\sqrt{16+9}[/tex]

[tex]r=\sqrt{25}[/tex]

[tex]r=5[/tex]

So, the radius of the circle is 5 units.

The standard form of a circle is

[tex](x-h)^2+(y-k)^2=r^2[/tex]

Where, (h,k) is center of circle and r is the radius.

Putting h=0, k=0, r=5, we get

[tex](x-0)^2+(y-0)^2=5^2[/tex]

[tex]x^2+y^2=25[/tex]

Therefore, the radius of the circle is 5 units and the equation of the circle is [tex]x^2+y^2=25[/tex].

21=-7n
It's a one-step equation. Please help!!

Answers

Answer:

-3=n

Step-by-step explanation:

21=-7n

divide both sides by -7

-3=n

Answer:

n=3

Step-by-step explanation:

21 ÷7=3

n=3

PLS HELP ME 12x - 15 = 6 - 3x

Can you pls show me the solving steps and the answer I have to type a paper on how to solve this problem help me plsss (10 points)

Answers

Answer:

x= 21/15

if you need to reduce it would be x=7/5

Step-by-step explanation:

12x-15 =6-3x

add 3x to both sides

15x- 15 = 6

now add 15 to both sides

15x = 21

lastly divide both sides by 15

x= 21/15

if you need to reduce it would be x=7/5

Answer:

x = 7/5 or 1.4

Step-by-step explanation:

12x - 15 = 6 - 3x Need to move one variable term to the other side to

+3x + 3x isolate it on one side

---------------------------

15x - 15 = 6 need to +15 to isolate the variable term

+15 +15

-----------------------

15/15x = 21/15 (simplify 21/15 = 7/5) need to divide by 15 to isolate x

------------------------

x = 7/5 or 1.4

What is £1.30 increased by 20%

Answers

£1.56 because 20 % of £1.30 = 26 p so 26 + 130 = £1.56

Step-by-step explanation:

20 % of 1.30 is 1.30×20 / 100 = 0.26

1.30 increased by 20% is 1.30+0.26= 1.56

Henry drives at a speed of 80miles per hour how long will it take to drive 400miles

Answers

5 hours. hope this helps

5.5 hours
Step-by-step explanation:

10. Find the measurement of angle A

(look at the picture)

Answers

Answer:

m angle = 116

Step-by-step explanation:

Write the function that represents the sequence in the table

Answers

Answer:

n= 5x each time

Step-by-step explanation:

Guy plz Quickly
Ashley wants to know how much wrapping paper is needed to cover a box with the dimensions shown.

What is the surface area of the box?

A.
140 square inches

B.
190 square inches

C.
95 square inches

D.
175 square inches

Answers

Answer:

A. 190 inches

Step-by-step explanation:

Plug in the numbers to the surface area formula to get 190, i messed up last time

190 I was working for like 20 min on this

Find the greatest common factor of 8m and 12m^3

Answers

the greatest common factor is 4

PLS HELP ASAP! GIVING BRAINLIST!

Answers

D is your answer. 6a^2 b^2(2a - b)

help i don't know what to do please help

Answers

Suki is correct because adrienne subtracted 6 instead of -6

need help solving to complete the square

Answers

Answer:

b=9 and b=-21

Step-by-step explanation:

first step: move 195 to the other side by adding to get:

b^2+12b=189

now to find the constant you take the b value which is 12 divide that by 2 and square it. then add the product to both sides. 12/2=6, 6^2=36

b^2+12b+36=189+36

next factor b^2+12b+36.

(b+6)^2=225

square root both sides to get:

b+6=15 and b+6=-15

solve by subracting 6 to both sides and you get the 2 final answers.

b=9 and b=-21

help please i'll give you 20 points!!

Answers

Answer:

Step-by-step explanation:

I'm not completely sure but I hope it helps

Answer:

28 is answer

Step-by-step explanation:

14×2= 24

Hope it helpedddddddddd

A farmer has a field in the shape of a semicircle of diameter 50 m. First,
calculate the length of the semicircle to 1 decimal place.
50 m

Answers

Answer:

157.1 m

Step-by-step explanation:

Here, we want to calculate the length of the semi-circle

This simply refers to the circumference of the semi-circle

Mathematically, the circumference is half that of a full circle

The circumference of a full circle is;

C = pi * d

For half circle or semi-circle;

It is ;

C = (pi * d)/2

D = 50 m

The circumference is thus;

C = 50 * 3.142

C = 157.1 m

7 * ( -15 ):

por favor, es urgente):

Answers

Answer: From what I understand you want me to do 7*(-15)??? and the answer to that is -105.

Step-by-step explanation: All you have to do is 7*-15

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