PLS HELP WILL MARK BRAINLIEST AND 30 POINTS!! Chris and Denisha are electricians.
Chris uses c=50h+65 to calculate how much he charges (c) in dollars for h hours of work.
Denisha uses d=37.50h+75 to calculate how much she charges (d) in dollars for h hours of work.
How much do Chris and Denisha charge per hour of work??

Chris charges $ per hour
Denisha charges $ per hour

Thank you!!

Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Rectangle bcde is similar to rectangle vwxy. what is the length of side vy? a) 1 7 b) 2 7 c) 3 7 d) 4 7