Exit Which number comes last if the numbers 0.000000009, 0.0450, 321.598, and 1.0000001 are arranged in order from fewest to most significant digits? A. 1.0000001 B. 321.598 C. 0.0450 D. 0.000000009

fewest to most:

0.000000009 ⇒ 0.0450 ⇒ 321.598 ⇒ 1.0000001

Step-by-step explanation:

0.000000009 = 1 sig fig

0.0450 = 3 sig figs

321.598 = 6 sig figs

1.0000001 = 7 sig figs

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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