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Bingel [31]
3 years ago
14

When do you use trig functions?

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
7 0
When you have all three sides
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13. Marissa buys a prepaid cell phone card for $25. The charge for a phone call is $0.13 per minute, or part of a minute. Write
valentina_108 [34]

Answer:

The correct option is;

Marissa can talk for at most 192 minutes

Step-by-step explanation:

The amount for which Marissa buys the prepaid cell phone card = $25

The charge for a phone call using the recharge card = $0.13 per minute

The greatest number of minutes Marissa can call is given by the the following inequality;

t < $25/($0.13/minute)

$25/($0.13/minute) = (192 + 4/13) minutes

Therefore;

t <  (192 + 4/13) minutes

The cost of 192 minutes = 192 minutes × $0.13 per minute = $24.96

The amount of credit left on the $25 recharge = $25 - $24.96 = $0.04

The minimum  charge for calls = $0.13

The amount remaining after 192 minutes $0.04 is less than the amount to make a call $0.13

Therefore;

t ≤ 192 minutes

Therefore, Marissa can talk for at most 192 minutes.

5 0
3 years ago
What is the equivalent decimal of -1\5 and -2\9
Nina [5.8K]

Answer:

1/5=10/50

2/9=20/90

Step-by-step explanation:

1/5 is just a simpler way of saying 10/50 same as 2/9

3 0
3 years ago
Here are two squares, A and B. A B The length of each side of square B is 4cm greater than the length of each side of square A.
alina1380 [7]

Answer:

144cm²

Step-by-step explanation:

Area of square A Aa = La²

Area of square B  Ab= Lb²

If the length of each side of square B is 4cm greater than the length of each side of square A, then;

Lb =  La + 4 ... 1

Also if the area of square B is 70cm² greater than the area of square A, then;

Ab = Aa + 70

Since Aa =  La² and Ab =  Lb²

Lb² = La² + 70 ...2

Substitute 1 into 2;

(La+4)² = La²+70

Expand

La²+8La+16 = La²+80

8La+16 = 80

8La = 80 - 16

8La = 64

La = 64/8

La = 8cm

Since Lb = La + 4

Lb = 8 + 4

Lb = 12cm

Area of square B = Lb²

Area of square B = 12²

Area of square B = 144cm²

4 0
3 years ago
Read 2 more answers
A little girl kicks a soccer ball. It goes 10 feet and comes back to her. How is this possible?
Elanso [62]

She is standing in front of a wall which is 10 feet away when she kicks the ball and it hits the wall and comes back to her by the virtue of Newton's third Law of motion! She kicks the ball into the air vertically above her and the ball rises to 10 feet and then comes back to her by the virtue of gravity!

8 0
2 years ago
A bird flies 50km everyday to collect food for his offspring and 20km to drink water. To fly this distance takes him 1 hour and
dem82 [27]

Answer:

42km/h

Step-by-step explanation:

70km=100 minutes

7km= 10min

42km=60min

42km/h

7 0
1 year ago
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