A construction crew is building a swimming pool that is 6 feet wide, 20 feet long, and 8 feet deep. Once everything is complete,
1 answer:
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Answer:
∠J = 60°
Step-by-step explanation:
The Law of Cosines tells you ...
j² = k² +l² -2kl·cos(J)
Solving for J gives ...
J = arccos((k² +l² -j²)/(2kl))
J = arccos((14² +80² -74²)/(2·14·80)) = arccos(1120/2240) = arccos(1/2)
J = 60°
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<em>Additional comment</em>
It is pretty rare to find a set of integer side lengths that result in one of the angles of the triangle being a rational number of degrees.
Let's first solve for the $5 off coupon,
The final total is $23.00 with $5 off.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Now for the final price of the 20% off coupon,
0.2 or 0.20 is decimal form of 20%. Easier to multiply than in percent form!
$5.6 or $5.60 is 20% of 28, we're not done yet!
Lastly, subtract 20% off of 28 (5.6) from 28,
$22.4 or $22.40 is the final after 20% off!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Q. Which is less after the discounts??
$23.00 or $22.40
A. $22.40 of course which was the 20% off.
Part A : Which coupon should she use ?
Answer : Well, to get a lower price, less to pay, the 20% off coupon is better!
Part B: How much money will she save by using the better coupon?
Answer : $5.6 / $5.60 is the amount she'll save!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
I hope that helps you out!!
Any more questions, please just ask me!!
~ Zoey
The final total is $23.00 with $5 off.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Now for the final price of the 20% off coupon,
0.2 or 0.20 is decimal form of 20%. Easier to multiply than in percent form!
$5.6 or $5.60 is 20% of 28, we're not done yet!
Lastly, subtract 20% off of 28 (5.6) from 28,
$22.4 or $22.40 is the final after 20% off!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Q. Which is less after the discounts??
$23.00 or $22.40
A. $22.40 of course which was the 20% off.
Part A : Which coupon should she use ?
Answer : Well, to get a lower price, less to pay, the 20% off coupon is better!
Part B: How much money will she save by using the better coupon?
Answer : $5.6 / $5.60 is the amount she'll save!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
I hope that helps you out!!
Any more questions, please just ask me!!
~ Zoey