7 (4p) i dont get it

What i more 2.5 lb of rock or 40 oz of feathers

Which percent is equivalent to1/8?

Which expression is equivalent to 7k+13-4k+10+5k-6? a. 35k b. 8k-3 c. 8k+17 d. 16k+29

After 15% discount an item cost $22.27 what was the original price?

What is the value of the expression when n=3? - 2n (5 + n - 8 - 3n)

Assume running consumes 108 calories per mile. If you run 11 - minute mile what is your average power output, in watts, during a 2-hour run?

You find that your watch gain 2 minutes in 6 hours. how will it gain in 3 days?

A car traveled 27.5 miles in 30 minutes how many miles per hour was it travel

In a marketing class of 60 students, the mean and the standard deviation of scores was 70 and 5, respectively. Use Chebyshev's theorem to determine the number of students who scored less than 60 or more than 80.

A store sells a television for $1000. Customers can choose to receive a 10% discount and pay it off with a loan at a simple interest rate of 4%, or they can choose to pay full price and pay it off in 3 years with no interest.