54.6g of sugar is needed to make 7 cakes. How much sugar is needed for 12 cakes?
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153.8 grams of sugar is needed

Step-by-step explanation:

93.6g

Step-by-step explanation:

54.6g/7=7.8g

7.8*12=93.6

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