Aschool has 63% girls and 37% boys. if 23% of the girls wear contacts and 42% of the boys wear contacts, what percent of all students wear contacts

30.0%

Step-by-step explanation:

0.63×0.23=0.1449≈14.5% approx 14.5%

Therefore, 14.5% of all students at the school are girls who wear contacts.

Let's repeat this for boys by multiplying the percent of boys at the school by the percent of boys that wears contacts.

0.37×0.42=0.1554≈15.5% approx 15.5%

Therefore, 15.5% of all students at the school are boys who wear contacts.

0.145+0.155=0.3=30.0%

30.0% of all the students wear contacts.

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,