The Geology Club is on a trip to study the Grand Canyon during spring break. While waiting in the airport security line, Courtney notices that it takes about 4 minutes for 15 people to pass through security. Courtney estimated that there are about 100 people ahead of her school ground in line. She is growing impatient and decide to figure out how long it takes.

sin3a=12/15

step-by-step explanation:

since one side was multiplied by 3 the other side must also be multiplied by 3.

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

well the answer to that is xoxoxo

step-by-step explanation: