
Concept explainers
Human Memory Model Students in a mathematics class took an exam and then took a retest monthly with an equivalent exam. The average scores for the class are given by the human
memory model
(a) Use a graphing utility to graph the model over the specified domain.
(b) What was the average score on the original exam
(c) What was the average score after 4 months
(d) What was the average score after 10 months

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Chapter 5 Solutions
Trigonometry (MindTap Course List)
- skip A swimming pool plan has concrete stairs leading down into the shallow end How much concrete will be needed to build the stairs? Bift 9 ft 2 ft 1 ft 9 ft 2 ft 5 ft [ ? ] ft³arrow_forwardFor the given right triangle, the longer leg is 8 units long and the shorter leg is 6 units long. sina=arrow_forwardWrite the equation of the trigonometric function shown in the graph. LO 5 4 3 2 1 y -5 -5 4 8 8 500 -1 -2 -3 -4 -5 x 5 15л 5л 25л 15л 35π 5л 4 8 2 8 4 8arrow_forward
- 2. If log2 (sin x) + log₂ (cos x) = -2 and log2 (sin x + cos x) = (-2 + log2 n), find n.arrow_forwardIf cscx- cotx = -4, find cscx + cotx.arrow_forwardQuestion 10 (5 points) (07.04 MC) Vectors u and v are shown in the graph. -12-11 -10 -9 -8 -7 -6 -5 What is proju? a -6.5i - 4.55j b -5.2i+2.6j с -4.7631 3.334j d -3.81i+1.905j < + 10 6 5 4 3 2 -3 -2 -10 1 -1 -2 -3 u -4 -5 -6 -7arrow_forward
- Find the lengths of PR and OR in terms of the angles α and β. Find the angles ∠ONQ and ∠NPQ. Find the lengths of ON and PN in terms of the angle β. Find the length of PQ. Find the length of QR. Find the length of OM. Find the length of RM. What formula can you write down by noting that PR = QR + PQ? What formula can you write down by noting that OR = OM - RM?arrow_forward5) Solve the triangle. 2 95° 4 B с A) c=3.63, A=59.5°, B = 25.5° C) c = 4.63, A = 59.5°, B = 25.5° A B) c 4.63, A 25.5°, B = 59.5° = = D) c 5.63, A = 25.5°, B = 59.5°arrow_forwardFind zw. Leave your answer in polar form. = လ 3π 2 z = 6 cos 6 cos 37 3π + i sin 2 57 W = 12 cos + i sin 6 6 ༠།ལྦ་arrow_forward
- 10 Write the expression (1 – i) i)in the standard form a + bi.arrow_forward11) The letters r and 0 represent polar coordinates. Write the equation r sine = 10 using rectangular coordinates (x, y). A) x = 10y B) y = 10 C) x = 10 D) y = 10xarrow_forward18) Find all the complex cube roots of - 8i. Leave your answers in polar form with the argument in degrees.arrow_forward
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