Which of the following is NOT an exponential decay function? A: y = (3/4)^x
B: y = 5.6^x
C: y = 14(0.62)^x
D: y = (1/6)^x

B

Step-by-step explanation:

An exponential decay function can be written in the form;

V = I(1-r)^t

A can be written as

y = 0.75^x

y = (1-0.25)^x

B cannot be written as that

c as y = 14(1-0.38)^x

d as y = (1-0.83)^x

Step-by-step explanation:

An exponential decay is when we input the input value and the output value decreases or in simple words, as the value of x increases, the value of y decreases.

We can see option B.

When we increase the value of x, the value of y will no doubt increase. So the function is not an exponential decay function.

50

Step-by-step explanation:

We know that Lucy can type 52 more words than Jim (who types 548 words in 12 minutes).

Now that we know Lucy can type 600 words in 12 minutes, how many does she type per minute? To solve, we simply divide 600 by 12.

Lucy can types 50 words per minute.