Answer: 
Step-by-step explanation:
Reformatting the input :
Changes made to your input should not affect the solution:
(1): Dot was discarded near "7.".
<u>STEP 1: </u>
Simplify 
<u>The equation at the end of step 1:</u>

<u>Multiplying exponential expressions:</u>
2.1
multiplied by

Final result is 
I'm assuming you're subtracting. It would be 3.9. The second one would be 0.65.
Answer:
0.05
Step-by-step explanation:
divide 100 by 20
he should know how much gallons he need to fill his car up
multiply 1.50 by the amount of gallons he need so he should know how much money to spend on that many gallons
hoped i helped and brainlist plz
Answer: y = 0.5cos(x), choice A
The parent function y = cos(x) follows this same basic pattern of the curve shown, but it starts off at (0,1) as its highest point. This graph has its highest point to be half as high, so we multiply by 1/2 or 0.5