1. Yes, you are correct. 22 students completed 80 puzzles, so the average number of puzzles completed per student would be 80/22 = 3.6, rounded to the nearest tenth.
2. Yes, you are correct. If the recipe uses 4 tablespoons of kernels and you use 10 tablespoons, that is equivalent to 2.5 times the recipe. Since the recipe uses ½ cup (8 tablespoons) of butter, you would need 8 tablespoons * 2.5 = 20 tablespoons, which is equivalent to ⅛ cup.
3. Yes, you are correct. The total cost would be the price of the bench plus the sales tax, which is $359.98 + ($359.98 * 7.25%) = $359.98 + $26.10 = $386.38, rounded to the nearest hundredth.
4. Yes, you are correct. If a real 3cm bug is drawn to be 10cm in a picture, the scale factor would be 10/3 = 3.3, so the scale factor used is 1:3.3.
5. No, you are incorrect. To find the percentage of error, you would use the formula: (|actual value - estimated value| / actual value) * 100. So in this case, it would be (|15 - 18| / 15) * 100 = (3/15) * 100 = 20%.
1. 22 students completed 80 puzzles. How many puzzles would 1 student complete? (round to tenth) 3.6.
2. Recipe uses ½ c butter, 4 tablespoons kernels, and 1 tsp salt. If you use 10 tbs kernels, how much butter will you need? ⅛.
3. You buy a bench that is $359.98. Sales tax is 7.25%. What is total cost? (hundredth) 386.38
4. A real 3cm bug is drawn to be 10cm in a picture. What scale factor was used? 1:3.3
5. Jill estimated a room to be 18ft tall. It was actually only 15 ft tall. What is her percentage of error? (tenth) 16.7%.
am i correct?
1 answer