What is the answer to this question?

Step-by-step explanation:

a-= 7.2 × 10-8

(scientific notation)

= 7.2e-8

(scientific e notation)

= 72 × 10-9

(engineering notation)

(billionth; prefix nano-(n))

= 0.000000072

(real number)

b-= 6.3 × 10-9

(scientific notation)

= 6.3e-9

(scientific e notation)

= 6.3 × 10-9

(engineering notation)

(billionth; prefix nano- (n))

= 0.0000000063

(real number)

c- = 4.56 × 10-5

(scientific notation)

= 4.56e-5

(scientific e notation)

= 45.6 × 10-6

(engineering notation)

(millionth; prefix micro- (u))

= 0.0000456

(real number)

d- = 7.041 × 10-10

(scientific notation)

= 7.041e-10

(scientific e notation)

= 704.1 × 10-12

(engineering notation)

(trillionth; prefix pico- (p))

= 0.0000000007041

(real number)

76%

step-by-step explanation:

24% are dogs and the remaining is 76% because 100-24=76