Which should be calculated first to solve this story problem?
dave has had a gym membership for 10 weeks. he goes to the gym 5 times a week. each visit, he exercises for 1.75 hours. he spends 0.5 hours on the treadmill and the rest he spends on the stationary bicycle.
how much time does dave spend on the stationary bicycle in a week?
a.
the total number of hours dave spends on the stationary bicycle each visit
b.
the total number of hours dave spends on the treadmill each month
c.
the total number of times dave spent exercising in 10 weeks

make sure the answer is correct
don't just say "i think its "

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?