Math Answers

A cookie recipe for 60 cookies calls for 4 cups of flour. How much flour is needed to make 90 cookies?

the average hour spent using the computer by 20 senior high school students during online class is 7 hour with a standard deviation of 2 hours. construct a 98% confidence interval of average hour spent by all senior high school students. identify the width of the interval

Production cost is 293250,computing components cost is1035,labour cost is 4140,and the savings on reusable material is 1725,determine the number of devices produced.

The production cost is R293250,computing components cost is R1035,labour cost is R4140 and the savings on reusable material is R1725,determine the number of devices produced.

 the mean working hours of 400 college teachers was found to be 15.7 hours with standard deviation of 1.5 hours. test the hypothesis that the mean working hours is 16 hours against the hypothesis that it is greater than 16hrs at 1% level of significance

Two coins are tossed and the random variable Z gives the number of heads. Find the range space, possible outcomes, and give the table of values.

if f(x)=x² and g(x)=2x-1.find1.gf(x) 2.fg(x) 3.inverse of g(x)?

A bag contains 3 black balls and 2 red balls,a ball is picked at random and replaced.

what is the probability they are both black?

If one side and two angles of one triangle are congruent to two angles and one side of another triangle, are the two triangles guaranteed to be congruent?

IN A SAMPLE OF OWLS IT IS FOUND THAT . There were 35 red males, 70 red females, 50 gray males, and 45 gray females IS THE COLOR INDEPENDANT OF SEX OF SAMPLE