## alainabbyboo22 Group Title At a certain time of day, a 5 foot tall man has a 7.5 foot shadow. If a tree is 20 feet tall, what is the length of the shadow of the tree? 2 years ago 2 years ago

1. alainabbyboo22 Group Title

2. alainabbyboo22 Group Title

A. 30 feet B. 12 feet C. 24 feet D. 15 feet

3. alainabbyboo22 Group Title

or at least could someone tell me what i need to do to find my answer ? do i multiply to get the length ? divide ?

4. Chlorophyll Group Title

Apply ratio with S is the length of the tree shadow: S/ 20 = 7.5 / 5 => S = ...? @alainabbyboo22 Can you continue?

5. alainabbyboo22 Group Title

what is "S" supposed to be ? i don't get this ..

6. ganeshie8 Group Title

Shadow its same as x in ur pix

7. alainabbyboo22 Group Title

oh okay . but no , i'm unable to continue because i'm unsure of how to do this . /:

8. ganeshie8 Group Title

$$\frac{S}{20} = \frac{7.5}{5}$$ you need to solve S

9. ganeshie8 Group Title

for that you need to isolate S, multiply 20 both sides

10. alainabbyboo22 Group Title

S/400 = 150/S

11. alainabbyboo22 Group Title

correct or incorrect ?

12. Chlorophyll Group Title

You divide it :(

13. ganeshie8 Group Title

$$\frac{S}{20} = \frac{7.5}{5}$$ multiply 20 both sides $$20*\frac{S}{20} = 20*\frac{7.5}{5}$$

14. ganeshie8 Group Title

does 20 cancel on left side ?

15. ganeshie8 Group Title

$$\cancel{20}*\frac{S}{\cancel{20}} = 20*\frac{7.5}{5}$$

16. ganeshie8 Group Title

simplify right side

17. Chlorophyll Group Title

@alainabbyboo22 Learn to multiply, will you !