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Alex777 [14]
3 years ago
6

A sporting goods store is offering a 10% discount on in-line skates that normally cost $110.99. How much will the in-line skates

cost with the discount, not including tax?
Mathematics
1 answer:
IgorLugansk [536]3 years ago
5 0

Answer:

$90.90

Step-by-step explanation:

The item normally costs $110.99. If the sporting goods store is offering a 10% discount, it means that the price including the discount will be:

$110.99 x 0.90 = $99.891.

the in-line skates cost with the discount $99.89, not including taxes.

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A bank advertises that they will pay 1.5% simple annual interest on new savings accounts. Lorenzo puts $400 in a new account. If
Luba_88 [7]

Answer:

  $406

Step-by-step explanation:

The amount of interest that Lorenzo's account earns is given by ...

  I = Prt

where P is the principal amount ($400), r is the annual rate (1.5%) and t is the number of years (1).

Lorenzo's interest is ...

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Then the balance in Lorenzo's account at the end of one year is ...

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3 0
3 years ago
The taxi and takeoff time for commercial jets is a random variable x with a mean of 8.4 minutes and a standard deviation of 3.5
Lorico [155]

Answer:

0.6672 is the required probability.            

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 8.4 minutes

Standard Deviation, σ = 3.5 minutes

We are given that the distribution of distribution of taxi and takeoff times is a bell shaped distribution that is a normal distribution.

According to central limit theorem the sum measurement of n is normal with mean \mu and standard deviation \sigma\sqrt{n}

Sample size, n = 37

Standard Deviation =

=\sigma\times \sqrt{n} = 3.5\times \sqrt{37}=21.28

P(taxi and takeoff time will be less than 320 minutes)

P( \sum x < 320) = P( z < \displaystyle\frac{320 - 37(8.4)}{21.28}) = P(z < 0.4323)

Calculation the value from standard normal z table, we have,  

P(\sum x < 320) =0.6672 = 66.72\%

0.6672 is the probability  that for 37 jets on a given runway, total taxi and takeoff time will be less than 320 minutes.

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3 years ago
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The answer you are looking for is 12.0
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Step-by-step explanation:

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