Kara has five exam scores of 63 59 67 75 and 73 in her biology class what score does she need on the final exam to have a mean grade of 70?

50-60=10

step-by-step explanation:

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours