Which fraction is equal to 0.7 a. 7/99 b. 7/11 c. 7/10 d. 7/9

C

Step-by-step explanation:

Here BD & AB represent the string.

Now in triangle DBC, CD is opposite to 25° and BD = 50 is the hypotenuse.

The trigonometry ratio associating opposite and hypotenuse is sin.

So we have

Multiplying by 50 on both sides

CD = 50 × sin 25°

CD = 21.13 feet

Now in triangle ABC, BC = opposite and AB =50 is hypotenuse with respect to 45°.

So we have

Multiplying by 50 on both sides

AC = 50 × sin45°

AC = 35.36 feet

Hence the kite moves up by = 35.36-21.13 = 14.23 feet.

The approximate difference in the height of the kite is 14.2 feet

Option a) is the right answer.