Select all sequences that are geometric. * A {5, 15, 45,...}
B {1, 2, 3,,...)
C {2, 4, 6, ...)
D {20, 10, 5, ...)

:malik received a $300 gift card from his grandparents and is using it only to pay for his karate lessons, which cost $30 per month. determine what amount, in dollars, remains on the card after 8 months.