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Ksju [112]
3 years ago
15

2. What is the pay rate for someone who works 3 hours and earns $21?

Mathematics
2 answers:
Cloud [144]3 years ago
8 0
C. 7 hours because to find the hourly pay do 21 divided by 3 which is equal to 7
Zielflug [23.3K]3 years ago
7 0

Answer:

C. $7/hour

Step-by-step explanation:

To solve this you would do 21/3 to get the unit rate. Which in this case is the answer. And since 21/3 = 7, the answer would be $7 per hour.

Hope this helps :D

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3.
sergey [27]

Answer:

His money earned $36 after 3 months

Step-by-step explanation:

* Lets revise the rules of simple interest

- Simple Interest Equation (Principal + Interest)

 A = P(1 + rt)

- Where:

• A = Total amount (principal + interest)  future amount

• P = Principal Amount

• I = Interest Amount

• r = Rate of Interest per year in decimal; r = R/100

• t = Time Period involved  

* To calculate the interest I use the formula

  I = P × r × t

* Lets solve the problem

- The rate is annual

- The interest calculated after 3 months

∴ I = P × R/100 × t/12

∵ P = $3600.00

∵ R = 4%

∵ t = 3 month

∴ I = 3600.00 × 4/100 × 3/12 = $36

* His money earned $36 after 3 months

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Step-by-step explanation:

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