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2 years ago

Evaluate f(-3) for f(x) = 2^x a. 1/8 b. -8 c. 8 d. -6

Mathematics

1 answer:

pickupchik [31]2 years ago

6 0

Answer:

Step-by-step explanation:

f(-3) = 2^-3

to get rid of a negative in an exponent, move the whole thing to the denominator.

1/(2^3)

2^3 = 2×2×2

1/(2×2×2)

1/8

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Oxana [17]

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3 years ago

Jerald jumped from a bungee tower. If the equation that models his height, in feet, is h = –16t2 + 729, where t is the time in s

Snezhnost [94]

Answer. First option: t > 6.25

Solution:

Height (in feet): h=-16t^2+729

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h < 104

Replacing h for -16t^2+729

-16t^2+729 < 104

Solving for h: Subtracting 729 both sides of the inequality:

-16t^2+729-729 < 104-729

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Multiplying the inequality by -1:

(-1)(-16t^2 < -625)

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Replacing t^2 by [ Absolute value (t) ]^2:

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Square root both sides of the inequality:

sqrt { [ Absolute value (t) ]^2 } > sqrt (39.0625)

Absolute value (t) > 6.25

t < -6.25 or t > 6.25, but t can not be negative, then the solution is:

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3 years ago

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3 years ago

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Hey ! there

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