C. we multiply the equation by 3
They have to pay the 30$ fee first then it depends on how many people are coming with you
Answer:
x=9/2
Step-by-step explanation:
Alright, so we'd use the combinations with repetition formula, so we choose from 4 schools to distribute to and distribute 8 blackboards. It's then
( 8+4-1)!/8!(4-1)!=11!/(3!*8!)=165
For at least one blackboard, we first distribute 1 to each school and then have 4 blackboards left, getting (4+4-1)!/4!(4-1)!=7!/(4!*3!)=35
The formula for the area of a circle is

so you simply plug your value for radius into the equation!

Square 14

And Multiply by pi!
615.75 cm^2 approximately!
I hope this helps!