Significant fig and scientific notation

How would you write 0.0005 in scientific notation?

• 50 x 10⁵
• 5 x 10^-4
• 5 x 10³
• 0.5 x 10³

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

What is 78.5 rounded to one significant figure?

• 79
• 78.5
• 70
• 80

Round 1047.78 to three sig figs

• 104
• 105
• 1050
• 1050.00

How many Significant Figures in the number below?
4.56 x 10³

• 5
• 4
• 6
• 3

What is the correct notation for: 352,300,000

• 3.0 x 10⁸

• 0.3523 x 10⁹

• 352.3 x 10⁶

• 3.523 x 10⁸

What is equal to 7.652 x 10⁵

• 760,000

• 7,652,000

• 762,500

• 765,200

Simplify: 50 - (35 - 10 ⋅ 2)

• 50

• 0

• 35

• -5

Simplify:

63 ÷ 7 - 3 ⋅ 2 + 4

• 7

• -9

• -1

• 3

Simplify:

(21 - 1) ⋅ 2 ÷ 4

• 10

• 5

• 4

• 40