An apple is packed in a case each weighing 5 kg 100 g. how many such cases can be loaded in a van that can carry 900 kg?

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

Simplify the expression. -2/5(10+15m-20n)

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =