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ololo11 [35]
4 years ago
13

A hang glider dropped his cell phone from a height of

Mathematics
1 answer:
elixir [45]4 years ago
5 0

Answer:

It took the cell phone 4.15 seconds to reach the ground

Step-by-step explanation:

The formula is  t=\frac{\sqrt{h}}{4} , where t is the time and h is the height

The height of that the cell phone dropped from it is 275 feet above the ground

∴ h = 275

- Substitute the value of h in the formula to find t

∵ t=\frac{\sqrt{275}}{4}

∴ t=\frac{5}{4}\sqrt{11}

- Change it to decimal

∴ t = 4.15 seconds to the nearest 2 decimal places

It took the cell phone 4.15 seconds to reach the ground

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Trevor tutors French for $12 an hour and scoops ice cream for $8 an hour. He is going to work 20 hours this week. At least how m
sineoko [7]

Hours He will work in this Week=20 hours.

Number of Hours he will Teach=x

Number of Hours He will Eat icecream=y

We know

x+y=20

x=20-y (Equation 1)

Teaching French=$12

Eating Icecream=$8

Let He Total Money he Earn from Teaching.

=12×Number of Hours he work

=$12x

Eating Icecream=$8

Total money spent=$8y

But Total Money=$190

MEANS

$12x+$8y=$190

12(20-y)+8y=190

240-12y+8y=190

-4y=190-240

-4y=-50

y=50/4

y=12.5

We know x+y=20

x+12.5=20

x=20-12.5

x=7.5 hours

MEANS He have to teach At least =7.5 hours.To make $190

\boxed{\mathbf{He\:have\:to\:teach=7.5\:hours}}

8 0
4 years ago
7. Given secθ = V10 and tanθ= 3, determine<br> the following<br> csc(90° -θ)
marin [14]

\csc(90^{\circ}-\theta)\\\\=\sec \theta \\\\=\sqrt{10}

5 0
2 years ago
If y = 5x − 4, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?
Mama L [17]

Answer:

x can be any value, x will be the input, y will be the output.

Step-by-step explanation:

If x = 3, If x = 6, If x = 9,

y = 5x - 4

y = 5 (3, 6, or 9) - 4

y = 11, y = 26, y = 41.

These are all possible sets of ordered pairs, but ANY Real number can be represented as X, and it will need to be in an order. These numbers are all positive, so in this case, you just have to draw out Quadrant 1 in a Coor. Plane.

<u>X (Input)  I  Y (Output)</u>

3              I  11

6              I  26

9              I  41

See, when x increases by 3, Y increases by 15. If you go on, it will be the same path, same pattern.

Hope This Helps! :)

8 0
3 years ago
If f(x)=2^x-1 and g(x)= x^2-1, determine the value of (f o g)(3)
zimovet [89]

Answer: 4

Step-by-step explanation:

( f o g ) (3) means f(g(3)) so...

First: plug 3 into g(x) = x^ (2-1)

3^ (2-1) is 3^1 = 3

Next: plug 3 into f(x)= 2^(x-1)

2^(3-1) is 2^(2) > 2×2 = 4

3 0
3 years ago
Becky and Julia decided to go on vacation. They found a great deal for 20% off any cruise. If their budget is $1,115, where can
serious [3.7K]

Answer:

Step-by-step explanation:

20% of 1150 is 230, so 1150-230=920

if the tax is applied after the discount, you find 10% of 920 (which is 92)

you add that to the discounted price 920+92= 1012, so they could go to florida.

8 0
2 years ago
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