Week 4: Practice HW 4: 7.1-7.6 (Homework) MATH 115, section B10, Fall 2018
Instructor: Ethan Smith
Current Score : Due : Monday, September 24 2018 11:59 PM EDTLast Saved : n/a Saving...
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1. 0.25/0.25 points | Previous AnswersAufExc4 7.6.033.MI.
Use a calculator. Round to the nearest tenth.
Find tan−1(0.6745).
34 °
2. 0.25/0.25 points | Previous AnswersAufExc4 7.2.011.MI.
Given AB = 12 cm, CD = 9 cm, and AD = 39 cm, find the length of BC.
BC = 18 cm
3. 0.25/0.25 points | Previous AnswersAufExc4 7.2.504.XP.
A triangle has a 18° angle and a 62° angle. What is the measure of the third angle?
100 °
4. 0.25/0.25 points | Previous AnswersAufExc4 7.1.013.
Convert between the two measurements.
52 cm = _____ mm
520
,5. 0.25/0.25 points | Previous AnswersAufExc4 7.4.044.
Find the unknown side of the triangle when x = 40 in and y = 9 in.
41 in
6. 0.25/0.25 points | Previous AnswersAufExc4 7.2.003.
Find the complement of a 62° angle.
28 °
7. 0.25/0.25 points | Previous AnswersAufExc4 7.6.027.
Use a calculator. Round to the nearest tenth of a degree.
Given sin θ = 0.6317, find θ.
39.2 °
8. 0.25/0.25 points | Previous AnswersAufExc4 7.6.029.
Use a calculator. Round to the nearest tenth.
Find cos−1(0.7265).
43.4 °
9. 0.25/0.25 points | Previous AnswersAufExc4 7.6.021.
Use a calculator to estimate the value of the following. Round to the nearest ten-thousandth.
sin 33.9°
.5577451
, 10.0.25/0.25 points | Previous AnswersAufExc4 7.1.035.
As our scientific and technical knowledge has increased, so has our need for ever-smaller and ever-larger units of measure. The
prefixes used to denote some of these units of measure are listed in the table below.
Prefixes for large units Prefixes for smaller units
10n 10n
Name Symbol Name Symbol
yotta Y 1024 yocto y 10−24
zetta Z 1021 zepto z 10−21
exa E 1018 atto a 10−18
peta P 1015 femto f 10−15
tera T 1012 pico p 10−12
giga G 109 nano n 10−9
mega M 106 micro µ 10−6
These new units of measure are quickly working their way into our everyday lives. For example, it is quite easy to purchase a 1-
terabyte hard drive. One terabyte (TB) is equal to 1012 bytes. As another example, many computers can do multiple operations in
1 nanosecond (ns). One nanosecond is equal to 10−9 s.
Convert between the two units. (Enter your answer using scientific notation.)
2.5 T = _____ Y
-12
2.5 ✕ 10
11.0.25/0.25 points | Previous AnswersAufExc4 7.5.015.
Find the volume of a cube whose side measures 2.2 in. (Round your answer to three decimal places.)
10.648 in3
12.0.25/0.25 points | Previous AnswersAufExc4 7.4.056.MI.
Solve. Round to the nearest tenth.
Find the perimeter of a right triangle with legs that measure 3 in. and 4 in.
12 in.