Yesterday, Edith went surfing and was out for 2 hours. Today, she spent 50% more time than yesterday riding waves. How long was Edith out surfing today?

3 hours

Step-by-step explanation:

From the given information,

Edith spent 2 hours the previous day which implies 100%

50% increase today means (2 hours of previous day) + (50/100 × 2)

= 2 hours + (0.5 × 2)

= 2 hours + 1 hour

= 3 hours

Therefore, edith spent 3hours surfing today.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have