Question Explanations For
Practice Test 2 (Calculator)
If you chose (A), you may have evaluated f(c) and stopped there.
If you chose (C) you may have confused which line corresponded to which crab.
If you chose (B) you may have forgotten the negative sign and solved for the equation of the parabola outright.
If you chose (C), you most likely found the value of y2.
This means that Jorge will have been running for 2.6 hours before Isabella catches up to him, after she and Tom have been driving for 2.6 – 2 = 0.6 hours. In that time, Tom has driven (77)(0.6) = 46.2 kilometers; in 2.6 hours, Jorge has gone 39 kilometers. Therefore, the distance between them is approximately 39 + 46 = 85 kilometers.
If you chose (A), you may have found the distance Jorge travelled and stopped there.
If you chose (B), you most likely found the total energy absorbed if all the plants were in the shed. If you chose (D), you most likely found the total energy absorbed if all the plants were outside.
If you chose (A), you may have forgotten the minus sign and thought that t = 5.
This tells you that x = –3 or x = –5. Make sure to plug these solutions back into the original equation to ensure that they are indeed solutions. Finally, the product of –3 and –5 is 15.