Susan Nicholson sells home furnishings. She is paid an 8% commission on the first
$2,000-worth of sales, 10% on the next
$2,500, and 15% on all sales over $4,500.
What is her commission on $4,910-worth
of sales?
O $471.50
O $1085
O $710

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

We just started the introduction into circles and i have no idea how to do this.

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.