The percentage of adult height attained by a girl who is x years old can be modeled by f ( x ) = 62 + 35 log ( x − 4 ) , where x represents the girl’s age (from 5 to 15) and f(x) represents the percentage of her adult height. Use the function to solve Exercises 113-114. Round answers to the nearest tenth of a percent. Approximately what percentage of her adult height has a girl attained at age ten? The bar graph shows the average number of hours per week that U.S. wives and husbands engaged in housework in six selected years. Use this information to solve Exercises 115-116.
The percentage of adult height attained by a girl who is x years old can be modeled by f ( x ) = 62 + 35 log ( x − 4 ) , where x represents the girl’s age (from 5 to 15) and f(x) represents the percentage of her adult height. Use the function to solve Exercises 113-114. Round answers to the nearest tenth of a percent. Approximately what percentage of her adult height has a girl attained at age ten? The bar graph shows the average number of hours per week that U.S. wives and husbands engaged in housework in six selected years. Use this information to solve Exercises 115-116.
Solution Summary: The author calculates the percentage of adult height attained by a girl at the age of 10 by using the given function f(x)=62+35mathrmlog
The percentage of adult height attained by a girl who is x years old can be modeled by
f
(
x
)
=
62
+
35
log
(
x
−
4
)
,
where x represents the girl’s age (from 5 to 15) and f(x) represents the percentage of her adult height. Use the function to solve Exercises 113-114. Round answers to the nearest tenth of a percent.
Approximately what percentage of her adult height has a girl attained at age ten?
The bar graph shows the average number of hours per week that U.S. wives and husbands engaged in housework in six selected years. Use this information to solve Exercises 115-116.
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Determine if the values of the variables listed are solutions of the system of equations.
2x - y = 4
3x+5y= - 6
x=1, y = 2; (1,-2)
Is (1, 2) a solution of the system of equations?
L
No
Yes
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10. A sound wave's amplitude can be modeled by the function y = −7 sin ((x-1) + 4). Within the interval 0 < x < 12, when does the function have an amplitude
of 4? (Select all that apply.)
9.522 seconds
4.199 seconds
0.522 seconds
1.199 seconds
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