In right triangle ΔABC, ∠C is a right angle, AC = 20 and m∠A = 41º. Find AB to the nearest tenth.
2 answers:
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Answer:
C. When the survey was initially conducted average sales of smartphones was 1.7 millions units.
Step-by-step explanation:
We have been given that the average annual sales of smartphones, in million units, n years after the survey is conducted is modeled by function , where the parameter b is an unknown positive base.
We are asked to find the true statement about our given function.
A. If b= 1.45, the annual growth rate of the sales of smartphones is 145%.
Since we know that b equals (1+r) for growth function, where r is in decimal form.
If b=1.45, it means that the annual growth rate will be 45% as 0.45 is decimal form of 45%, therefore, statement A is not true.
B. If b= 1.02, annual sales of smartphones will double in 2 years.
If b=1.02, it means that the annual growth rate will be 2% as 0.02 is decimal form of 2%, therefore, statement B is not true.
C. When the survey was initially conducted average sales of smartphones was 1.7 millions units.
Since we know that an exponential function is in form , where a in initial value of function. We can see from our given function that a equals 1.7, therefore option C is a true statement.
D. The average sales of smartphones increases by 1.7 millions units every year.
Since our function is not a linear function, instead it is an exponential function, so rate of change can not be constant.
Therefore, option D is not true regarding our given function.
Let
x------> the number of multiple choice question
y------> the number of free response question
we know that
-----> equation A
-----> equation B
Substitute equation B in equation A
Find the value of x
therefore
<u>the answer is</u>
the number of multiple choice question are
the number of free response question are