Please help...(will report spam) What is the graph of one cycle of a sine curve with amplitude 5, period pi, and a>0?

What is an equation for the sine curve in the form y=asinb0?

a. y=2sin50
b. y=5sinpi0
c. y=5sin20
d. y=5sin1/2 0

What is the standard form of -5x^2+2x^4-11+x^3+3x

Acircle has a circumference of 28.36 units what is the diameter of the circle

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4