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3 years ago

Evaluate (0.3)*4= plplpl

Mathematics

1 answer:

uranmaximum [27]3 years ago

5 0

Answer:

1.2

Step-by-step explanation:

0.3 * 4

= 3 * 0.1 * 4

= 3 * 4 * 0.1

= 12 * 0.1

= 1.2

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Billy works at a toy store. He put 1,573 new toys on a shelf. At the end of the day customers bought 862 of those toys. How many

Strike441 [17]

Answer:

Seven-Hundred and Eleven

Step-by-step explanation:

1. Take 1,573 and subtract how many the customer bought

2. You get your answer of: 711

1,573

-862

_____

711

4 0

3 years ago

Read 2 more answers

The height of a triangle is 8ft greater than the base. The area of the triangle is 136.5 square ft. Find the length of the base

mixer [17]

Answer:

the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

Step-by-step explanation:

Note that the formula for the area of a triangle is A = (1/2)(base)(height). Let's abbreviate that to A = (1/2)(b)(h). We are told that h = b + 8.

Then A = 136.5 = (1/2)(b)(b + 8), or

(after multiplying both sides by 2)

A = 273 = b^2 + 8b

which, when put into standard quadratic form, becomes:

b^2 + 8b - 273 = 0

The coefficients of this quadratic are a = 1, b = 8 and c = -273.

Thus, the discriminant is b^2 - 4ac, or 64 - 4(1)(-273) = 1156 = 17^2.

The roots are then

-8 ± √1156 -8 ± 17

x = -------------------- = ------------ = 9/2 and -25/2

2 2

Only the root 9/2 makes sense here, because measurements of length are positive.

Thus, the base is 9/2 ft and the height is 9/2 + 8, or 25/8, ft.

3 0

4 years ago

20 points please help.

astraxan [27]

Answer:
The student's score closest to 91 percentile.

Step-by-step explanation:

Since the scores on the standardized test are approximately normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = test scores.

µ = mean score

σ = standard deviation

From the information given,

µ = 480

σ = 90

If a student has a score of 600, then x = 600

For x = 600,

z = (600 - 480)/90 = 1.33

Looking at the normal distribution table, the probability corresponding to the z score is 0.91

the student's score closest to 91 percentile.

7 0

3 years ago

Can someone answer with steps and explanation? Thanks.

12345 [234]

Answer:

$BC=9\sqrt{3}\approx15.59\text{ units}$

Step-by-step explanation:

Since Segment BOA is a diameter:

$m\angle ACB=90$

Arc Ac and Arc CB are in a ratio of two to four. Since Segment BOA is a diameter, Arc ACB measures 180°. Letting the unknown value be x, we can write that:

$2x+4x=180$