7 = r^1/2 is the same as saying 7 = square root of r. So, to get rid of the square root sign on the r, you need to square it, and when you do something to one side of the equation, you have to do the same to the other side. So after squaring both sides, you get 49 = r.
The unit rate is how many calories are in 1 cup of cereal.
Set up a proportion:

Cross multiply and solve:

There are 100 calories per cup of cereal.
To get the calories in 4 cups of cereal, simply multiply the unit rate of 100cals/cup by 4.

There are 400 calories in 4 cups of cereal.
Answer:
The angle measures of trapezoid PQRS are equal to the corresponding angle measures of trapezoid P'Q'R'S'.
Step-by-step explanation:
Answer:
Squash plant.
Step-by-step explanation:
I'm not sure how to explain, but if you divide 9 by 3, you get 3. There are 3 squash plants, so that's the answer. You could also write it as a ratio...
9:3
3:1
I'm not exactly sure how to explain the ratio part either, but I hope it helped at least a little bit...have an amazing day :3
1. kilogram
2. pineapple
3. 2.2315
4. 627532
5. 1.71m
6. 840in^2
7. 41ft by 36ft; 154ft
8. 1,066ft^2
9. 6,556cm^2