Me plz explain your answer & answer both questions

a) 81

b) 79.38

Step-by-step explanation:

50% of 162 is half of 162. Since 50% is close to 49%, this is a good estimate. 162/2=81.

To find the exact value of 49%, I will take my estimate of 81 and subtract 1% to get 49% of 162. To find 1% I can divide 162 by 100 which is 1.62.

I subtract 81-1.62= 79.38.

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.