Quiz about Unit 7 HW 2

Question 1

Which of the following represents an exponential growth of thirty five percent?

Accepted Answer

$$f\left(x\right)=3500\left(0.35\right)^x$$

Answer

$$f\left(x\right)=135\left(35\right)^x$$

Answer

$$f\left(x\right)=15\left(3.5\right)^x$$

Answer

$$f\left(x\right)=35\left(1.25\right)^x$$

Question 2

Which function represents an initial population that increases 24% per year where A represents the initial value and x represents time in years?

Accepted Answer

$$y=A\left(1.24\right)^x$$

Answer

$$y=A\left(1.26\right)^x$$

Answer

$$y=A\left(1.74\right)^x$$

Answer

$$y=A\left(0.24\right)^x$$

Question 3

Suppose four (4) cannonballs were fired into the air and their flightpaths are modeled by four (4) quadratic functions with the following attributes:

Cannonball A: Has vertex point (2,300)

Cannonball B: Represented by the function f(x)=-(x-15)²+ 200

Cannonball C: Represented by the function f(x) = -4(x- 4) (x- 12)

Cannonball D: Represented by the table to the left:

Assume that the x-axis represnets the ground and f(x) represents the height in feet. Which cannonball went the highest?

Accepted Answer

Cannonball 4

Answer

Cannonball 1

Answer

Cannonball 2

Answer

Cannonball 3

Question 4

Exponential functions f and g are described to the left.

$$f\left(x\right)=40\left(12.5\right)^x$$

If the growth factor of function f is k times the growth factor of function g, what is the value k?

Accepted Answer

2.5

Answer

0.5

Answer

8

Answer

10

Question 5

An automobile originally purchased for $20,000 is losing value at a rate of 15% per year. The number of dollars it will be worth 5 years after purchase is $$20,000\left(0.85\right)^5.$$ Rewriting the expression $$20,000\left(0.85\right)^5$$ in which of these ways would be useful in calculating the rate at which it is losing value per month.

Accepted Answer

$$20,000\left(0.85^{60}\right)^{\frac{1}{12}}$$

Answer

$$20,000\left(0.85^{12}\right)^5$$

Answer

$$20,000\left(0.85^{12}\right)^{60}$$

Answer

$$20,000\left(0.85^{60}\right)^{12}$$

Question 6

Which function represents an initial population that increases 32% per year where A represents the initial value and x represents time in years?

Accepted Answer

y = A(1.32)^x

Answer

$$y=A\left(0.32\right)^x$$

Answer

y = A(0.68)^x

Answer

y = A(1.68)^x

Question 7

$$\left(2i+3\right)\left(i+4\right)$$

Which of the following is equal to the expression above? (Note, $$i=\sqrt[]{-1}$$ )

Accepted Answer

10+11i

Answer

12+3i

Answer

12i

Answer

(9+10i

Question 8

Question 8.

Accepted Answer

Table

Answer

Table and graph are equal

Answer

Graph

Answer

Need more information

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics