If a telescope originally costs $539.99 the tax rate is 10%. what is the total? pls someone explain how to solve these type of problems pl im not asking for a answer just explaining and possibly a example PLSS HELP ITS DUE IN 10 MINUTES

How many bananas are in a fruit bowl that has 200 total apples and bananas if there are 31 bananas for every 93 apples

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?