Answer:
The last one.
Step-by-step explanation:
The 1/2 slope has to be positive because the graph goes upward from the left to the right. If you plug in (3, -2), a possible point on the line, you get that 1=1, which is seemingly true.
Answer:
C
Step-by-step explanation:
The surface area (A) of a sphere is calculated as
A = 4πr² ← r is the radius, here r = 12, hence
A = 4π × 12²
= 4π × 144 = 576π units² → C
Answer:
The population size after seven days will be 171.
Step-by-step explanation:
The population of protozoa can be modeled by the following equation.

In which Q(t) is the population after t days, Q(0) is the initial population and r is the growth rate.
In this problem, we have that:

So

Find the population size after seven days.
This is Q(7).

The population size after seven days will be 171.
180=15+85+(4x-20)
180-15-85=4x-20
80=4x-20
4x-20=80
4x=80+20
4x=100
x=100/4
x=25
Answer:
$14
Step-by-step explanation:
x/17.5=20/100, do the butterfly method
17.5x20=350
350/100= 3.5
17.5-3.5=14