The amount 5th grade students grow during the school year is normally distributed with a mean of 4 inches and a standard deviation of 1 inch as shown below. Out of 1,000 5th graders, how many grow between 3 inches and 7 inches? 817 668 803 839​

Hannah works at the mall selling book bags. she sold 35 book bags in 5 hours. how many book bags did she sell per hour?

Martin likes to make flower bouquets that have 3 daffodils and 4 tulips per vase. a daffodil has a mass of d grams, a tulip has a mass of t grams, and the vase has a mass of u grams. the expression 5(3d + 4t + v) describes the mass of 5 bouquets. match each amount in the situation with the expression that represents it. situation expression number of bouquets mass of one bouquet mass of the tulips in one bouquet 4t mass of the daffodils in one bouquet 3d + 4t + v

Can you me find the missing length. i attached an image.