By the chain rule,

It looks like we're given

where <em>a</em> and <em>b</em> are presumably constant.
Recall that


so that

Then we have




where the last reduction follows from dividing through everything by
and simplifying.
I'm not sure at which point you're supposed to evaluate the derivative (22/7*4, as in 88/7? or something else?), so I'll leave that to you.
Step-by-step explanation:
The answer is 4x
Answer:
130
Step-by-step explanation:
91 is 70 percent of the price
70% of 130 is 130*0.7 = 91
Answer:
there have answer use solutions problem or write in note
Step-by-step explanation:
maybe if I can answer
Start: 8 a. m.
Finish: 1 : 30 p.m. = 13 hours 30 minutes
13 h 30 min - 8 h = 5 h 30 min
She should record 5 hours and 30 minutes on her time card for the day.