Which expressions are equivalent to 4x^4-9x^2?
(could be more than one answer.)
a. (2x^4-3x^2)(2x^4+3x^2)
b. 4x^2(x^2-5)
c. x^2(4x^2-9)
d. (2x^2-3x)(2x^2+3x)

halp plz

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

15 liters is approximately how many gallons