Use scientific notation to estimate the number of inches in 1,225 miles. include all calculations in your final answer. 1 inch ≈ 1.578 × 10 -5 miles.

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Which function has the domain x> -11