Answer:
140 students are probably 10th graders
Step-by-step explanation:
This survey is supposed to represent the whole of the group, and so it is reasonable to assume that the ratios and percentages of people in each grade would be equal in the same as it is in the whole. For this sample, we have a total of 30 people surveyed (14+8+5+3), and 14 of them are 10th graders. Then, you would set up a proportion to find the number of 10th graders in 300. The equation would be 14/30=x/300. This isnt very hard to figure out because you just cross multiply to get 30x=4200, and you then divide each side by 30 to isolate x, which leaves you with x=140. This leaves you with the answer that 140 students are 10th graders.
18 mins divided by 9 = 2
2papers = 1 min
100 papers = 50 min
Answer:
21862
Step-by-step explanation:
it is simple you put 643
.................... * 34
first you multiply 4 times 3 and you get 12 so you put a one above the 4 in 643 and put three under the equation and so aon with all the numbers on top.
then you move on to the 3 in 34 and then you multiply it my all the numbers in 643 and you get the answer of 21862
hope this helped!!