Answer:
70.8°
Step-by-step explanation:
The sides and angles are related in a right triangle such that ...
Tan = Opposite/Adjacent
tan(S) = UT/US = 6.6/2.3
The inverse tangent function is used to find the angle from its value:
∠S = arctan(6.6/23)
∠S ≈ 70.8°
The total bill amount before the service fee is given as $45.
We are given that the tip she wants to leave is 15% of the bill amount, this means that:
tip value = 0.15 * 45 = 6.75$
The total bill would be the summation of the original bill and the tip value she left.
Total bill amount = 45 + 6.75 = 51.75$
Answer:

Step-by-step explanation:
Let x = number of books that Hannah donated
We know that the number of students is 150 and the total number of books is represented by b, we can write that as:
Average number of books donated by each student = 
Now we know that Hannah donated 3 times as much as the average. We can write that as:

Answer:
Sadie's error is " she made error in step 2
where
"
Because she made error in splitting the powers to simplify the square root
<h3>Therefore the correct answer for Sadie's expression is
where 
</h3>
Step-by-step explanation:
Given that " Sadie simplified the expression StartRoot 54 a Superscript 7 b cubed EndRoot, where a greater-than-or-equal-to 0, "
It can be written as
where 
The given expression is
where 
To find Sadie's error and explain the correct answer :
Sadie's steps are
where 


<h3>

where

</h3><h3><u>Now corrected steps are</u></h3>
where 
(by using the identity 
(by using the identity
)

Therefore
where 
<h3>The correct answer is
where 
</h3>
Sadie's error is " she made error in step 2
" where 
Because she made error in splitting the powers to simplify the square root
<h3>Therefore the correct answer for Sadie's expression is
where 
</h3>
Answer: a. The unit for the numerator is Dollars
b. The unit for the denominator is seconds.