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2 years ago

You are going to add a 15% tip to your bill. If the meal cost you $13.80, what is your tip amount? *

Mathematics

2 answers:

leva [86]2 years ago

8 0

Answer: $2.07

Step-by-step explanation:

Trust me this is the real answer.

NNADVOKAT [17]2 years ago

4 0

Answer: 15% of 13.80 = 1.95

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A dragonfly traveled at a rate of 35 miles per hour for 2.5 hours. What distance did the dragonfly travel?

igomit [66]

The dragonfly traveled a distance of 87.5 miles at a rate of 35 miles per hour.

Explanation:

Distance traveled by butterfly at the rate of 34 miles per hour in 2.5 hours
=35 mi/hr × 2.5 hour
=35mihour ×2.5 hour
=35mi⋅2.51⋅1010
=35mi⋅2510
=35mi⋅52
=175mi2
=87.5mi

∴ It would travel a distance of 87.5 miles.
Here mi represents miles.

8 0

3 years ago

Read 2 more answers

The manufacturer of an electronic device claims that the probability of the device failing during the warranty period is 0.005.

Zielflug [23.3K]

Answer:

The value is $P(X \ge 15) = 0.5$

Step-by-step explanation:

From the question we are told that

The probability of the device failing during the warranty period is $p = 0.005$

The sample size is $n = 3000$

The random variable considered is x = 15

Generally this is distribution is binomial given the fact that there is only two out comes hence

X which is a variable representing a randomly selected selected electronic follows a binomial distribution i.e

$X \~ \ B(n , p)$

Now the mean is mathematically evaluated as

$\mu = n * p$

=> $\mu = 3000 * 0.005$

=> $\mu =15$

The standard deviation is mathematically represented as

$\sigma = \sqrt{np(1 -p )}$

=> $\sigma = \sqrt{3000 * 0.005 * (1 - 0.005 )}$

=> $\sigma = 3.86$

Now given that n is very large, then it mean that we can successfully apply normal approximation on this binomial distribution

$P(X \ge 15) = P( \frac{X - \mu}{\sigma } \ge \frac{x - \mu}{\sigma } )$

Now applying Continuity Correction we have

$P(X \ge (15-0.5)) = P( \frac{X - \mu}{\sigma } > \frac{(15 -0.5) - 15}{3.86 } )$

Generally $\frac{X - \mu}{\sigma } = Z (The \ standardized \ value \ of \ X)$

$P(X \ge (15-0.5)) = P(Z >-0.130 )$

From the z-table

$P(Z >-0.130 ) =0.5$

Thus

$P(X \ge 15) = 0.5$

7 0

3 years ago

What is 52% of 25? plzz helppp

Sonbull [250]

Answer: its 13

Step-by- 52 percent *25 =

(52:100)*25 =

(52*25):100 =

1300:100 = 13

step explanation:

5 0

2 years ago

Read 2 more answers

Rick serves his community as a firefighter. he works for a full 24 hours and then is off for the next 48 hours before his next 2

Mrac [35]

Answer: D. $24.30

Step-by-step explanation:

I'm not completely sure.

7 0

2 years ago

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Two boys are running track. They decide to start in the northwest corner and go opposite directions around the rectangular track

Mariulka [41]

= 187.3 yards

Step-by-step explanation:

The set-up will represent a triangle whereby the :

Width = Height = 150 yards
Diagonal = Hypotenuse = 240 yards
Length = Base = ?

${a}^{2} = {c}^{2} - {b}^{2} \\ {a}^{2} = {240}^{2} - {150}^{2} \\ {a}^{2} = 57600 - 22500 \\ \sqrt{ {a}^{2} } = \sqrt{35100} \\ a = 187.3yards \: (rounded \: off \: to \: 1dp)$

3 0

2 years ago