Greg built a plane model. The initial weight of Greg's model was 21.8 pounds. He added a propeller that weighed of the initial weight of the model. Greg estimates that the total
weight of the model with the propeller is about 24 pounds. Is Greg's estimate of the total
weight of the model reasonable?
Greg built another model. The initial weight of this model was 22.7 pounds. He added wings
that weighed of the initial weight of the model. Greg estimates that the total weight of the
model with the wings is about 27 pounds. Is Greg's estimate of the total weight of the model
reasonable?
5

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?

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