Estimating quantities and units using scientific notation

The length of the Amazon River in South America is 6,400 kilometers. What is this length written in scientific notation?

• 6.4 x 10²

• 6.4 x 10³

• 6.4 x 10^-4

• 6.4 x 10^-3

Put 8.5 x 10^3 in standard form.

• 85,000,000

• 8,500

• 850

• 85

0.0067

• 6.7x10^-4

• 6.7x10³

• 6.7x10^-5

• 6.7x10^-3

How would you write 4.3756 x 10⁴ in standard form?

• 4,3756

• 43,756

• 437,560,000

• 0.00043756

In-state students from Minnesota pay $1.4 x 10⁴ for tuition at the University of Minnesota. Out-of-state students pay $2.4 x 10⁴ for tuition. How many times more does an out-of-state student pay than an in-state student?

• About 17 times more.

• About 1 times more.

• About 0.58 times more.

• About 1.7 times more.

• 3,206,000

• 320,600

• 763.33

• 76.33

• 0.000001235

• -1,235,000

• 0.0000001235

• 1,235,000

0.0090413

• 9 x 10^-3
• 904.13 x 10^-5
• 9.0413 x 10^-3
• 90413 x 10^-7

• .000005369

• .000005639

• .00005369

Which of the following is 9.2 X 10⁷ written in standard form?

• 0.00000092

• 9.2000000

• 920,000,000

• 92,000,000