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emmasim [6.3K]
3 years ago
8

NEED HELP ASSSAAPPP

Mathematics
1 answer:
lakkis [162]3 years ago
7 0

Answer:

0

Step-by-step explanation:

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When Gabriella runs the 400 meter dash, her finishing times are normally distributed with a mean of 79 seconds and a standard de
kupik [55]

Answer:

(78, 80)

Step-by-step explanation:

Given a normal distribution :

Mean = 79 seconds

Standard deviation = 0.5 seconds

Using the empirical rule :

95% of her finishing times :

According to the empirical rule, 95% represents 2 standard deviations from the mean that is ± 2 standard deviations from the mean score or value.

Hence ;

The interval will be defined as ;

Mean ± 2(standard deviation)

79 ± 2(0.5)

79 ± 1

(79 - 1) ; (79 + 1)

78 ; 80

4 0
3 years ago
Which set of numbers can represent the side lengths, in inches, of an acute triangle?
MrMuchimi

Answer:

B. 5, 7, 8

Step-by-step explanation:

When you take the sum of the squares of 5 and 7 they are greater than the square of 8.

5² + 7² = 8²       Simplify

25 + 49 = 64    Add

74 > 64

If this answer is correct, please make me Brainliest!

8 0
3 years ago
Mrs. Chesney bought 3 games at a cost of $14.99 each. What will she pay including 7% sales tax
max2010maxim [7]

Hey there!

The 3 games cost $14.99 each, so multiply to find the cost of the three combined without the tax (the subtotal).

14.99 × 3 = 44.97

To find the amount of tax she will have to pay, we must find 7% of 44.97, the price without the tax added to it (the subtotal).

100% = 1.0

7% = 0.07

Multiply 44.97 by 0.07 for the amount of tax.

44.97 × 0.07 = 3.1479

Add the tax to the cost of the games without tax (subtotal).

44.97 + 3.1479 = 48.1179

Round the amount to the nearest cent. The thousandths place is 7, so it gets rounded up.

The total she has to pay for the games is $48.12.

Hope this helps!

5 0
4 years ago
URGENT PLEASE HELP:What is the volume of a box 20 cm by 30 cm by 40 cm? (in cm3) ​
nexus9112 [7]

Answer:

24,000 cm^3

Step-by-step explanation:

Volume is LxWxH

20x30x40=24,000cm^3

5 0
3 years ago
Read 2 more answers
A map of Long Island has the scale 2.75 cm= 16km. On the map, target Rock is 23.2 cm from Lake Montauk. Find the distance from T
pentagon [3]

Answer:

ytjyhyjhuyjhytujhyuhjnfh

Step-by-step explanation:

4 0
3 years ago
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