The answer is 26. First, you have to multiply 15 x 5. You'll get 75. Then, you add 17. You get 92. Then, add 20 + 46. You get 66. Then, subtract, and you'll get 26.
So, the question asks for 64 % of the number 75, which can also be written as:
64%*75.
64% can also be written as a fraction:

so the multiplication will be:

so the answer is 48.
.7
because you need to get the original unit price which is 0.7 then multiply that by 1 and get your answer
Answer:
7 hours
Step-by-step explanation:
Since, the final amount of caffeine formula would be,

Where,
P = Initial value,
r = rate per period,
t = number of periods,
Here, r = 10% = 0.10, t = h, A = 


Taking log both sides,



Hence, after 7 hours the amount of caffeine in a body to reduce by half.