This is fracton operations
there is 4/5lb sand in the class science supplies. if one scoop of sand weighs 1/20lb , how many scoops of sand can maria get from the class supplies and still leave 1/2lb in the supplies?
le a sloution to me understand

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2