Answer: 14 presents
Step-by-step explanation:
5 presents 42 cm tape
——————I-———————.
15 cm tape 1
= (5x42) /15 = 14 presents
In this problem, you're looking for the value of t, so that f(t) = 48. That means if you put t into 5t-7, you'll get 48. To do this set up and solve an equation for t by setting 48 equal to 5t-7:

Isolate the variable by adding 7 to both sides.

Divide by 5 on both sides to find t.

The answer is 11.
Answer:
$3523.44
Step-by-step explanation:
5000 = X × e^(3.5/100)(10)
X = 5000 ÷ e^0.35
X = 3523.440449
All you would do is multiply .9 by 20
.9*20=18
90% of 20 is 18