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22 May, 18:22

In the following equations, t represents time in hours and m represents mass in mf. Which of them (if any) would have a mass less than 50 mg after 2 hours? Select all that apply.

a. y = 100 (0.5) ^x

b. y = 500 (0.3) ^x

c. y = 80 (2) ^x

d. y=10 (1.2) ^x

e. y=30 (1.5) ^x

f. y=80 (0.2) ^x

g. y=100 (2) ^x

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Answers (1)
  1. 22 May, 20:19
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    a, b, d and f

    Step-by-step explanation:

    To find which equation will have a a mass less than 50 mg after 2 hours, we just need to use the value of x = 2 and then verify if the values of y are less than 50:

    a. y = 100 * (0.5) ^2 = 25 - > apply

    b. y = 500 * (0.3) ^2 = 45 - > apply

    c. y = 80 * (2) ^2 = 320 - > doesn't apply

    d. y = 10 * (1.2) ^2 = 14.4 - > apply

    e. y = 30 * (1.5) ^2 = 67.5 - > doesn't apply

    f. y = 80 * (0.2) ^2 = 3.2 - > apply

    g. y = 100 * (2) ^2 = 400 - > doesn't apply
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