At a sale, coats were sold for \( \$ 104 \) each. If the coats originally cost \( \$ 160 \) each, what percentage of its original price was a coat sold for?

A train travels for 3.75 hours at 80 miles an hour. Use the formula \( d=r \cdot t \), where \( d= \) distance, \( r= \) rate, and \( t= \) time, to find the distance the train traveled. The distance traveled is miles. The solution is

A problem requires finding the number of cars on a dealer's lot. Which would not be a reasonable answer? Justify your response. \( \begin{array}{lll}\text { A. } 0 & \text { B. } 6 & \text { C. } 1 \\ \text { D. } 6 \frac{1}{2}\end{array} \) A. 0 ; there cannot be a zero number of cars. B. 6 ; there cannot be an even number of cars. C. 1 ; there cannot be an odd number of cars. D. \( 6 \frac{1}{2} \); there cannot be a fractional number of cars.

3) Maurice has a pet hamster. In October he spent \( \$ 13.68 \) on hamster food \( \$ 7.89 \) on wood shavings \( \$ 21.14 \) on a new hamster wheel. About how much money did he spend on his hamster? Estimate by rounding each amount the nearest dollar. Exactly how much did he spend on his hamster in October?

Heather is building a model volcano for the science fair. To find the right ratio, she starts by mixing small amounts of baking soda and vinegar. She finds that adding 1.5 teaspoons of baking soda for every fluid ounce of vinegar produces the best eruption. If Heather plans to use 0.5 cups of vinegar for her project, how many tablespoons of baking soda should she use? Hint: There are 3 teaspoons in 1 tablespoon. There are 8 fluid ounces in 1 cup. Write your answer as a whole number, decimal, or simplified fraction. Do not round.

a) \( 2^{5}= \)