Estimate square root of21

As Mercury revolves around the sun, it travels at a rate of approximately 30 miles per second. Convert this rate to miles per minute. At this rate, how many miles will Mercury travel in 4 minutes?

A 3 foot stick is broken into two pieces. The ratio of the two pieces is 5:7. How big are the two pieces

Sisika hit a golf ball into the air with an initial upward velocity of 56 feet per second. The height h in feet of the ball above the ground can be modeled by h = - 162 + 56t, where t is the time in seconds after Sisika hit the ball.

Jenny has six basketball teams, each team needs new shoes for an upcoming tournament, and she spent 630 dollars on all the shoes thus far. Each pair of shoes cost 6 times more than last year's pairs of shoes. How much did last year's shoes cost?

A Person's chance of Winning a raffle is 1/18, if he buy's 15 tickets: a.) Determine the total number of tickets sold (4 marks). b.) What number of tickets does he need to buy, If he is to increase his chance of winning to 5/18. (4 marks).

A paperweight in the shape of a rectangular prism is shown: A right rectangular prism is shown with length 10 cm, width 4 cm, and height 4 cm.

Sandwiches at the deli cost $4.75 each and drinks cost $0.95 each. mrs. singh has $30.00 to spend. will $30.00 be enough to buy a sandwich and drinks for each of the 5 people in her family?

Square 33 is the first square in Row 5, the first square of the second half of the chessboard. How many pennies are on square 33?

What is the scintific notation of 4,497,000,000

Give an example of fractions that you would compare by finding common denominators and an example of fractions you would compare by finding common numerators.