The base's length is 8 and it's width is 7, so it's perimeter will be

. To find the lateral area you shoul multiply this with it's height. So,

(h is height).
Answer:
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Step-by-step explanation:1001010101001010101001010101010010101010101001010101010101010100101010101010101010101010101010000000000000000111111111110000000001010101001010101010
She'll have traveled approximately 431.07 km in 8.5 hours, also, 267.85448 miles per hour.