proof that angle subtended by a chord at the centre of a circle is twice the angle subtended by the same chord at any point on the circumference of the circle

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. what is the percentage decrease of jane’s closet space?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years