The radius of the circle is 10 cm The diameter of the semicircle is 8 cm
How many times bigger is the unshaded area than the shaded area?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true