Aboy knows that he is 5 feet 6 inches tall. at the time of day when his shadow is 4 feel long, a trees shadow is 16 feet long. what is the height of the tree?

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.

True or false: dilations map angles of the same degrees

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?