The answer is B.

This is because A is incorrect, Zach number of minutes didnt increase by an equal factor every month.

C and D are incorrect, Victoria's methods aren't exponential, but Zach's are.

So that leaves the only reasonable answer which is B.

5 0

3 years ago

What is 6 [4•(72-63)÷3]

QveST [7]

What is 6 [4•(72-63)÷3]?

6 [4•(72-63)÷3]

=72

7 0

3 years ago

If (3a + 3b + 1) (3a + 3b - 1) = 80, then a + b =

seropon [69]

Answer:

a+b = 4 $\sqrt{3}$

Step-by-step explanation:

3(a + b)^2 = 81

(a + b)^2 = 27

a + b = sq rt 27

a + b = $\sqrt{9}$ · $\sqrt{3}$

a + b = 3 $\sqrt{3}$

8 0

3 years ago

Emma is solving 16-8*=4(*+6) what should be her first step?

Emma is solving 16-8=4(+6) what should be her first step?