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olga_2 [115]
2 years ago
13

In 2014, the Centers for Disease Control and Prevention reported the average human life span in the United States as

Mathematics
1 answer:
kakasveta [241]2 years ago
7 0

Answer:

7.8

Step-by-step explanation:

subtract 85 - 77.2

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Raylan opened a savings account with $100. After 5 years there is $122. 50 in the account. What is his simple interest rate?
serious [3.7K]
<h3>Answer:</h3>

4.5% annually

<h3>Step-by-step explanation:</h3>

Simple interest is the amount of interest added to a singular sum of money at a fixed rate.

Formula

The formula for simple interest is A = P(1+rt). In this formula, A is the total amount of money in the account, P is the original amount deposited, r is the rate of interest as a decimal, and t is the time in years.

Calculations

To find the rate, plug the information we know into the formula above

  • 122.50 = 100(1+r*5)

Divide both sides by 100

  • 1.225 = 1 + r*5

Subtract 1 from both sides

  • 0.225 = r*5

Divide both sides by 5

  • 0.045 = r

This gives us the rate as a decimal. So, to find the rate as a percent. Do this by moving the decimal 2 places to the right (or just multiply by 100, they do the same thing). This means that the rate of simple interest is 4.5%.

5 0
2 years ago
Belle ran 5 5/6 miles around the track. Each lap is 5/6 of a mile. How many laps did Belle run?
STALIN [3.7K]
Belle ran 4 31/36laps

3 0
3 years ago
Sarah competes in a long jump competition Her first jump is 4.25m Her best jump is 12% more than this However, her best jump is
ad-work [718]

>First jump = 4.25 m

 

>Best jump = 1.12 * First jump

Best jump = 1.12 * (4.25 m)

Best jump = 4.76 m

 

>Best jump = 0.85 * Winning jump

Hence,

Winning jump = Best jump / 0.85

Winning jump = 4.76 m / 0.85

<span>Winning jump = 5.6 m</span>

8 0
3 years ago
1. Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 36. How old is each sister? (a) Wr
Jlenok [28]
A)
Kim's age=k
Sister's age=s
k=2s
k+s=36
b)
k=2s
k+s=36
k=36-s
2s=36-s
3s=36
s=12
12*2=24
Kim is 24 and her sister is 12

Hope this helps :)

6 0
3 years ago
Read 2 more answers
8w^2=50 i’m not sure how to find the answer
CaHeK987 [17]

8w^2=50

= w^2= (50÷8)

= w^2= 6.25

=w = √6.25

w= 2.5

8 0
3 years ago
Read 2 more answers
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