Question

Last Sunday, the average temperature was 8%, percent higher than the average temperature two Sundays ago. The average temperature two Sundays ago was T degrees Celsius

Which of the following expressions could represent the average temperature last Sunday? Choose 2
1.8T
1.08T
T+0.08
T+8
(1+8/100) T

Answer 1

Answer: 1.08T and (1+8/100)T

Explanation:

Given: The average temperature two Sundays ago was T degrees Celsius.

Since, last Sunday, the average temperature was 8% higher than the average temperature two Sundays ago.

⇒ The average temperature last Sunday
`=8\%\ of\ T+T`

Since 8%=0.08

Therefore, The average temperature last Sunday
`=(8)/(100)*T+T`

⇒ The average temperature last Sunday
`=T((8)/(100)+1)`

⇒ The average temperature last Sunday
`=T(0.08+1)`

⇒ The average temperature last Sunday
`=T(1.08)`

Thus, the right option is 1.08T and (1+8/100)T.