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: suppose a cube is 15 cm long,15 cm wide and 15 cm tall write an expression for the volume using exponents.

a. 15×3
b. 15×15×15
c. 15³
d. 15/3

: perform the indicated operations 21÷3×4-28.

a. 3
b. 0
c. 5
d. 8

: murphy is a teller at a bank, in 27 days she was able to serve 1566 customers ,on the average, how many customers did she serve in 4 days ?

a. 158
b. 320
c. 232
d. 412
​

Sagot :

RiftFlash139

Answer:

1. c. 15³

2. b. 0

3. c. 232

Solution:

Solution 1:

Exponent - An exponent refers to the number of times a number is multiplied by itself. For example, 2 to the 3rd (written like this: 2³)

2 x 2 x 2 = 8.

2³ is not the same as 2 x 3 = 6.

Based on the given above it's 15 and it's multiplied by 3 which means 15³.

Answer: The expression for the volume using exponents of 15 cm long, 15 cm wide and 15 cm tall is 15³.

Solution 2:

MDAS - Stands for Multiplication, Division, Addition, and Subtraction. It is part of the Order of Operations, a collection of rules that gives a sequence for simplifying mathematical operations. It is used when an expression or equation has more than one operation.

Divide 21 by 3 then Multiply by 4 then Substract by 28 like the procedure below:

21 ÷ 3 x 4 - 28 =

7 x 4 - 28 =

28 - 28 = 0

Answer: 0 is the answer.

Solution 3:

Divide 1566 by 27 and then Multiply it by 4 like the procedure below:

1566 ÷ 27 = 58

58 x 4 = 232

Answer: Murphy served 232 customers in 4 days in his job at bank.

Hope that helps a lot guys.

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