Jamel watched his older brother robert lift weights. the bar alone had a mass of 20 kg. on the bar he had tow 11.4 kg weights, two 4.5 kg weights , and four 450 g weights. what mass was robert lifting ?

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

If a || b and e || f , what if the value of y ?

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.