Me with this
a cup is 6.4 cm tall, not including a 0.6 cm lip. cups are stacked inside one another. you may want to draw a diagram to you see how the height of the stack of cups increases. select the function that represents the height of a stack of cups in terms of the number of cups in the stack.

H(c)=6.4+0.6c

6.4 is the constant

When the height of the cups is 18.4 the function is:

18.4=6.4+0.6c

Then you subtract 6.4 from both sides to get:

18.4-6.4=6.4+0.6c-6.4

12=0.6c

c=12/.6

c=20

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.