Simple math question!

Eliana's calculator displays a number as 5.378 E9.

What is this number in standard form?

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What's is 66tens-30tens?

A truck driver makes a trip that covers 2,380 km in 28 hours. What is the driver's average speed?

Mai's penny bank is 7/10 full. After she removes 200 pennies, it is 1/2 full. How many pennies can Mai's bank hold?

Solve for k m=-8j-9k+9

Tree A has a bright 8h-1 feet. Tree B has a height of 6h-11 feet. How much taller in feet is Tree A than Tree B?

Catskill is 15 miles from saugerties. what would the distance on the map be?

Jane is thinking of a number between - 10 and 10. if you multiply Jane's number by - 2, then subtract 2, the result is greater than 6. What is Jane's number

The table below represents a function. x-1,2,3,4,5 y-6,12,18,24,30 Which statement would best describe the graph of the function? The graph is a straight line that has a slope of 6. The graph is a horizontal line at y = 6.

Which value of x would make the following matrix singular? a. - 27 b.-10 c. 10 d. 27

What's the answer for 5x-2y=30