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CP 1 #12 14 18

# CP 1 #12 14 18 - have R = 118.52(138 – 0.4(138 2 Our...

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MAT 117 - CP 1 - # 12 With this problem, we want to know Mass of Mercury * __?__ = Mass of Sun Filling in the numbers we know, we have 3.302 x 10 20 * __?__ = 1.998 x 10 27 To find __?___ we need to divide both sides by the 3.302 x 10 20 . So we have ? = . * . * 1 998 10273 302 1020 So we divide the 1.998 / 3.302 first. This is 0.60508 Then we use our rule of exponents to take care of the 10 27 / 10 20 . So we have to subtract the exponents. We would have 10 27-20 = 10 7 At this point, we have .60505 x 10 7 However, this answer is not in scientific notation because .6 is not a number between 1 and 10. So we move it over to 6.0505 which means we have to move the 10 7 to 10 7 – 1 = 10 6 So our final answer, rounded to the nearest thousandths, would be 6.051 x 10 6 #14 If we sale 138 washing machines, this represents x. So we plug in 138 to our equation for revenue, R. So we

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Unformatted text preview: have: R = 118.52(138) – 0.4(138) 2 Our order of operations says to take care of the squared first. So 138² = 138*138 = 19044 R = 118.52(138) – 0.4(19044) Now we multiply each part. We get: R = 16355.76 - 7617.6 Now subtract R = \$8738.16 #18 + + + + 14x4 23x3 58x2 2-+ 34x4 38x2-2 Put like terms together: I color coded them for you. 14x4-+ + + + -34x4 23x3 58x2 38x2 2 2 Now let’s put these together. -+ + + + -1 34x4 23x3 5 38x2 2 2 →-+ + + -24x4 23x3 88x2 2 2 →-+ + + 12x4 23x3 1x2 0 →-+ + 12x4 23x3 x2 I reduced -2/4 to -1/2, and 8/8 reduces to 1. Let me know if you have questions. Kimberly...
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CP 1 #12 14 18 - have R = 118.52(138 – 0.4(138 2 Our...

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