Question 74 pts.
calculate the harvesting capacity of a combine that travels 4.8 miles per hour and has a header for eight
30-inch-wide rows. the efficiency is .85. the expected yield is 120 bushels/acre.
1,187 bu/hr
1,255 bu/hr
1,522 bu/hr
1,178 bu/hr

1,187 bu/hr

Step-by-step explanation:

4.8 mi/hr

240 inches

Efficiency: 85% (0.85)

120 bushels/acre

1 acre = 6 272 640

1 mile = 63 360 inches

4.8 miles = 304 128 inches

120/6 272 640 x 240 = 5/1089 (bushels/inch)

5/1089 x 304 128 x 85% = 1 186.9 = 1187 bu/hr

Wow, that's hard for me :) Hope it's helpful

 

This can be written as (-2p^2+10p-8)/(p^2-4) on a keyboard.

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Work Shown:

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Explanations:

In step 2, I factored p^2-4 using the difference of squares rule.In step 3, I multiplied top and bottom by (p-2) so that the second fraction has a denominator of (p+2)(p-2). We can only add fractions that have the same denominator.In step 5, I used the FOIL rule to expand (4-2p)(p-2) into -2p^2+10p-8. You can use the distribution rule or the box method as alternatives.