The half-life of a radioactive kind of protactinium is one minute. If you start with 88 g of it, how much will be left over after two minutes?

Answer:

X is 2

Step-by-step explanation:

the equation is Y = 19X

when X=5, Y=95

when Y=38, X = 38/19 = 2

Answer:

3/1

Step-by-step explanation:

27/9=3. However, the question wants it in fraction form. Next, just convert 3 into a fraction to get 3/1.

Answer:

x =12

Step-by-step explanation:

The two angles add to 90 degrees

4x+4 + 5x-22 = 90

Combine like terms

9x - 18 = 90

Add 18 to each side

9x -18+18 = 90+18

9x = 108

Divide each side by 9

9x/9 = 108/9

x =12

Answer:

C.) 52°

Step-by-step explanation:

find x first

4x + 4 + 5x - 22 = 90

9x - 18 = 90

9x = 108

x = 12

plug it into the expression

4(12) + 4

= 48 + 4

= 52°

I'll do problem 13 to get you started.

The expression [tex]4\left(\frac{2^n}{7^n}\right)[/tex] is the same as [tex]4\left(\frac{2}{7}\right)^n[/tex]

Then we can do a bit of algebra like so to change that n into n-1

[tex]4\left(\frac{2}{7}\right)^n\\\\4\left(\frac{2}{7}\right)^n*1\\\\4\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{0}\\\\4\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{1-1}\\\\4\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{1}*\left(\frac{2}{7}\right)^{-1}\\\\4*\left(\frac{2}{7}\right)^{1}\left(\frac{2}{7}\right)^n*\left(\frac{2}{7}\right)^{-1}\\\\\frac{8}{7}\left(\frac{2}{7}\right)^{n-1}\\\\[/tex]

This is so we can get the expression in a(r)^(n-1) form

Note that -1 < 2/7 < 1, which satisfies the condition that -1 < r < 1. This means the infinite sum converges to some single finite value (rather than diverge to positive or negative infinity).

We'll plug those a and r values into the infinite geometric sum formula below

S = a/(1-r)

S = (8/7)/(1 - 2/7)

S = (8/7)/(5/7)

S = (8/7)*(7/5)

S = 8/5

S = 1.6

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

Answer in fraction form = 8/5

Answer in decimal form = 1.6

Answer:

x = 4.6439

Step-by-step explanation:

2^x =25

Take the log of each side

log  2^x = log 25

We know that log a^b = b log a

x log 2 = log 25

Divide each side by log 2

x = log 25  / log 2

x =4.643856

Rounding to 4 decimal places

x = 4.6439

Answer:

x = 4.6439

Step-by-step explanation:

[tex]2^{x} =25log 2^x = log 25\\log 2 = log 25x = log 25 / log 2\\x =4.643856\\x = 4.6439[/tex]

Answer:

2160 [tex]ft^2[/tex] water can fit in the fish tank(if this is a question about how much water can fit in this tank)

Step-by-step explanation:

40 x 18 x 3 = 2160

Answer: If your finding volume the person above me is correct

Answer:

[tex]0 \le t < \infty[/tex]

Step-by-step explanation:

Given

[tex]c(t) = 3t[/tex]

Required

The domain

From the question, we understand that t represents number of yards/packages (depending on the store)

This means that:

[tex]t \ge 0[/tex] ---- the start value

[tex]t < \infty[/tex] --- the end value

Rewrite [tex]t \ge 0[/tex] as [tex]0 \le t[/tex]

So, we have: [tex]0 \le t[/tex] and [tex]t < \infty[/tex]

Hence, the domain is: [tex]0 \le t < \infty[/tex]

Answer:

20

Step-by-step explanation:

The number of Customers that visited the store during the eight hour if the median number of customers didn't change is; C: 20

We are given the data representing the first seven hours as; 12, 15, 18, 20, 23, 23, 28. Here; n=7

Thus;

Median = (n + 1)/2 = (7 + 1)/2

Median = 4th term

Thus, the median is 20.

When one data is added, n = 8. Thus;

Median will be the average of the 4th and 5th term. Since the median does not change, it means that the median number of customers per hour is still 20.

Read more baout Median at; https://brainly.com/question/1552529

Answer:

Answer:

Radius = √75 or 5√3 or 8.7

Step-by-step explanation:

This forms a right triangle meaning you can use Pythagorean Theorem to solve for the missing side which, in this case, will equal the radius.

Let a = radius

a² + b² = c²

a² + 11² = 14²

a² + 121 = 196

a² = 75

a = √75 = 5√3 ≈ 8.7

Answer:

radius = ab = √75

Step-by-step explanation:

Triangle ABC is a right triangle so to find the radius, aka one of the sides of the triangle, we need to use the Pythagorean theorem.

ac^2 = bc^2 + ab^2 Pythagoras Theorem

14^2 = 11^2 + ab^2 Substitution

196 = 121 + ab^2 Alg

75 = ab^2 Alg

ab = √75 Alg = radius

A

nswer:

5

-1/5

2/3

6/9 -> 2/3

Two parallels,

Two slope lines.

Answer:

The Slope of AB: 5

The Slope of DC: -1/5

The Slope of BC: 2/3

The Slope of AD: 2/3

The quadrilateral is a trapezoid because (only one pair of opposite sides is parallel)

Answer:

Step-by-step explanation:

A

Answer:

10.

Step-by-step explanation:

It's the right end of the box.

Answer:

5A) radius = 9 ft

5B) diameter = 18 ft

5C) fencing length = 56.52 ft

5D) 6.35 days

Step-by-step explanation:

Radius is given when it is 9 ft of rope (outside to center of circle)

Diameter is two times radius = 18.

Circumference(fence length) = 2 * 3.14 * 9 = 56.52.

Area circle = 3.14*(9*9) = 254.34. 254.34/40 = 6.35

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

{3π/4 , 7π/4}

Step-by-step explanation:

2 + Tanθ = 1

tan θ = 1 -2

Tanθ = -1

θ = 3π/4 and 7π/4

You cannot force me to answer these questions.

bestie that is worth more than 15 pts

Answer:

Please be careful with your typing [f(x)=-sqrt(x)+6 ... right? g(x)=-4*sqrt(x)-3 ... or -4*sqrt(x)+3 ... one or the other, right?

If so, you are dilating by a factor of 4, -1 versus -4 as multiplier of sqrt(x); and, translating up 3 units (6 versus 3) or 9 units (6 versus -3).

Step-by-step explanation:

Answer:

-2x+2

Step-by-step explanation:

f(x) = -4x+3 and g(x) = 3 +2x-4

Note what you put for g(x) simplifies to 2x-1

(f+g) (x) =  -4x+3+  3 +2x-4

Combine like terms

            = -2x+2

Answer:

m<MNO=150° it is equal to 150°

Answer:

m∠MNO = 75°

Step-by-step explanation:

Answer:

D, E and F

Step-by-step explanation:

They all seem to be congruent, except for 2.

I hope I helped

Answer:

2x +5x-20+3x=180(angle of triangle)

10x-20=180

10x=180+20

10x=200

x=200/10

x=20

Answer:

[tex]x = 20[/tex]

Step-by-step explanation:

Angles in a triangle is added up to 180 degrees

So, You can simply Solve it like this

[tex]2x + 3x + 5x - 20 = 180 \\ 10x = 180 + 20 \\ 10x = 200 \\ \frac{10x}{10} = \frac{200}{10} \\ x = 20[/tex]

Hope this helps you.

Have a nice day!

Answer:

$30

Step-by-step explanation:

Total amount paid by the hire purchase scheme:

$60 + 6 * $45 = $60 + $270 = $330

Total amount paid in just the cash price:

$300

Difference:

$330 - $300 = $30

Answer:

Step-by-step explanation:

Answer:

n=0

Step-by-step explanation:

is 0 because always the number is 0 in this case

Answer: a. 5+7x=y b.5+(7•6)= 47

Step-by-step explanation:

Answer:

Step-by-step explanation:

A.  i would do  7(2) 7 inches in 1 year aka 7 times 2 which 14 inches in 2 years

B. 12 inches is a foot keep that in mind. they want to know how many feet would it be in 6 years. so 7 inches times 6years is 42inches. so 42 inches divided by 12 cause there is 12 inches in a foot is 3.5 so three and a half feet in 6 years

-lots of love,

                         makayla<3

Answer:

x = -3

x = 7

Step-by-step explanation:

If either term is zero the product is zero

(2x + 6)(x - 7) = 0

2x + 6 = 0

2x = -6

x = -3

x - 7 = 0

x = 7

Answer:

2nd line

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

X + 2y = 13

Since x = 3

3 + 2y = 13

2y = 13 - 3

2y = 10

Divide both sides by 2

Y = 5