Mathdory

The 100-yard dash race-times, in seconds, for the Johnston Middle School track team are:

13.9, 13.2, 12.7, 16.3, 14.5, 14.7, 12.9, 14.0, 13.5, 12.9, 13.7

If Kathy finished 0.4 of a second slower than the first-place finisher, how long did it take her to finish the race? Represent the data, including Kathy's, using a stem-and-leaf plot.

What fraction of the racers completed the 100-yard dash faster than 14 seconds?

How many seconds faster is the first-place finisher than the last-place finisher? What is the combined race time of the first-, second-, third-, and fourth-place finishers? Justify your reasoning.

Well first we can sort the race times from fastest to slowest to see easier

12.7, 12.9, 12.9, 13.2, 13.5, 13.7, 13.9, 14.0, 14.5, 14.7, 16.3.

Kathy took 13.1 seconds to finish the race

7/11 of the racers finished the 100-yard dash faster than 14 seconds?

3.6 in between the first place and the last place

A total of 51.7 seconds of the combined time of the first, second, third, and fourth.

Hope this helped

Justin built a gaming website. The website had 42 visitors on Saturday. 3 out of every 7 visitors played Space Pats. The other visitors played Galactic Gamer. How many visitors played Galactic Gamer? 

Since 3/7 visitors played Space Pats that means that already 18 visitors played this game. Therefore the remainder of the 42-18 visitors played Galactic Gamer. 

24 visitors played Galactic Gamer.

Sorry it's C

There is an image but it takes a while to load.

https://web2.0calc.com/questions/points-a-b-and-c-are-on-a-sphere-whose-radius-is

The ratio of cans of coor paint to cans of white paint in three different ways is 4:3, 4/3 and 4 to 3.

One​ day, the local hardware store sold 29 buckets of basic house paint and 15 buckets of ultimate house paint. A bucket of basic house paint uses 2 cans of white paint and 7 cans of color paint. For a bucket of basic house​ paint, write the ratio of cans of color paint to cans of white paint in three different ways. Use pencil and paper.

The ratio to cans of color paint and cans of white paint is 7:2, 7/2, or 3.5 to 1.

I hope this helped 

1 is D

2 is C

3 is B

4 is A

Therefore the 4 digit code is 4321

The answer is B

The area of the triangle is 1/2 x B x H

B stands for base and H stands for Height

But in that diagram it doesn't show what the height is. This formula comes in handy which we can easily find the solution.

B is correct because it follows the area of the triangle.

https://web2.0calc.com/questions/hard-problem_5