Geoff earns 10% commission on his total sales at work. Part A: Suppose Geoff’s sales totaled $895 last week. How much did he earn in commission?

A.
$89.50

B.
$984.50

C.
$903.95

D.
$8.95

Activity 2 of 2
Part B: To pay for a concert ticket, Geoff needs to earn $135 in commission. What must Geoff’s sales total for the week?

A.
$13.50

B.
$1,350.00

C.
$135.00

D.
$13,500.00

Part A

89.50 dollars

Work Shown:

10% = 10/100 = 0.10

10% of $895 = 0.10*895 = 89.50

Part B

 $1350

Work Shown:

x = amount of sales for the week

10% of x = 0.10*x = 0.10x

0.10x = amount Geoff earns in commission

He needs $135, so 0.10x = 135

Divide both sides by 0.10 to isolate x

0.10x = 135

0.10x/0.10 = 135/0.10

x = 1350

He must have $1350 in sales for the week

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

answer: i guess 105 degrees?

step-by-step explanation: