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Ratling [72]
2 years ago
3

Calculate the kinetic energy of an 88-kg scooter moving at 18 m/s .

Mathematics
2 answers:
ELEN [110]2 years ago
8 0
The formula for calculating kinetic energy is:
0.5 x mass x speed^2 (^2 = squared)
Fed [463]2 years ago
5 0

Answer:

kinetic energy of the scooter is 14256 joule.

Step-by-step explanation:

Since kinetic energy of an object is represented by the formula

Kinetic energy = \frac{1}{2}(\text{Mass})(\text{Velocity}^{2})

Mass of the scooter = 88 kg

Velocity of the scooter = 18 meter per second.

Kinetic energy = \frac{1}{2}\times 88\times (18)^{2}

                        = 44×(18)²

                        = 14256 Joule

Therefore, kinetic energy of the scooter is 14256 joule.

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Joey is measuring the amount of time it takes for a frisbee to fly through the air he uses a stopwatch to time it and find that
marissa [1.9K]

Answer:percent error in Joey's measurement to the nearest 10th of a percent =- 4.6%

Step-by-step explanation:

Step 1

Time as recorded by the stopwatch = 4.82 seconds

Real Time it takes for a Frisbee to fly through the air =5.05 seconds

percent error =   Measured value – True Value /True value  x 100.

= 4.82 - 5.05 / 5.05 x 100

=-0.23/5.05

=-0.0455 x 100

=4.5544%

Rounding to nearest 10th of a percent = - 4.6%

8 0
2 years ago
You put $1200 in an account that earns 3% simple interest. Y= a (1 + r)t Find the total amount in the account after four years.
olchik [2.2K]

Hello!

To find how much money total will be in the account after four years, you need to use the function, y = a(1 + r)^{t}, as seen above. In this function, a is the starting value, r is the interest rate, and t is the amount of time (in years).

Before substituting values into the function, we need to convert 3% into a decimal. Remember that all percentages are out of 100, so we divide 3 by 100 and remove the percentage sign, or move the decimal two places to the left.

3/100 = 0.03 | 0.03 is the interest rate.

With all the necessary values, we can find the total amount in the account. In this case, a = 1200, r = 0.03, and t = 4.

y = 1200(1 + 0.03)^{4}

y = 1200(1.03)^{4}

y = 1200(1.12550881)

y = 1350.610572, which can be rounded to 1350.61 dollars.

Therefore, after 4 years, the total amount in the account will be about 1350.61 dollars.

6 0
2 years ago
How do you write 2.8 millimeters in expanded form?
KengaRu [80]
2.8 millimeter to meters is .0028 but to tell you, you didn't word the question correctly at there no such thing as expanded form
3 0
2 years ago
Read 2 more answers
Which expression is equivalent to (4 + 7i)(3 + 4i)? –16 + 37i 12 – 28i 16 – 37i 37 + 16i
ASHA 777 [7]

Answer:

The equivalent expression is \Rightarrow -16+37i    

A is correct

Step-by-step explanation:

 We are given two complex number and need to multiply it. To find equivalent fraction.

(4+7i)(3+4i)

Using Binomial product property: (a+b)(c+d)=ab+ad+bc+bd

\Rightarrow (4+7i)(3+4i)

\Rightarrow 4(3)+4(4i)+7i(3)+7i(4i)

\Rightarrow 12+16i+21i+28i^2

Combine the like term and simplify

\Rightarrow 12-28+37i           \because \ \ i^2=-1

\Rightarrow -16+37i    

Hence, The equivalent expression is \Rightarrow -16+37i    

4 0
2 years ago
Read 2 more answers
Here are the dimensions of the oven tray Lucy bakes the cakes on. ←700mm→↑600mm↓.A cake tin is 25cm in diameter. How many cake t
GREYUIT [131]
700*600=420,000
420,000/10=42,000
Diameter = 25
so radius = 12.5
Pi*12.5^2=625/4Pi
42,000/625/4 Pi =86.56169741
=86.6
she can fit 86 tins
8 0
2 years ago
Read 2 more answers
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