An extension ladder rests 4 m up a wall. If the ladder is extended a further 0.8 m without moving its feet, then it will now rest 1 m further up the wall. How long is the extended ladder?

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Pls brainliest will be awarded if answer is correct

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.