Part 1 out of 2 Select the real-world problem best represented by the equation 15x = 570. A An elephant walks with a speed of 15 steps a minute. How long was the elephant walking if she walked without stopping for 570 steps? B A giraffe eats 570 leaves per hour and eats for 15 hours. How many leaves did the giraffe eat? C A donkey and a cow are eating dandelions in a meadow. The donkey eats 15 dandelions while the cow eats 570 dandelions. How many dandelions in total were eaten by the donkey and the cow? D A canary flew for 15 hours going north, and then turned east and continued to fly straight until he had flown for 38 hours. How long did the canary fly east?

Option A.

Step-by-step explanation:

We will check each option given in the question.

Option A. If an elephant walks with the speed = 15 steps a minute

If it takes x hours to cover 570 steps then the expression should be

15x = 570

Therefore, Option A. will be the answer.

Option B. A giraffe eats leaves = 570 per hour

If it eats for 15 hours then number of leaves eaten by giraffe = 570×15

So the expression is not formed.

Therefore, Option B is not the answer.

Option C. Dandelions eaten by the donkey = 15

and dandelions eaten by cow = 570

So total dandelions eaten by cow and donkey together = 15 + 570

Again the expression is different so Option C is incorrect

Option D. A Canary flew for 15 hours towards north, then turned east and flew for 38 hours.

Here speed of the canary is not mentioned so it's not possible to form any expression for the distance covered by the canary.

Therefore, Option D is also incorrect.

Option A. is the answer.

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3