Anna had been given $25 to buy snacks for the office party. She bought crisps at $1.40 for a pack and nuts at $3.30 for a pack. She spent as much as possible without exceeding the $25.
How much money was left over?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?