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scoundrel
16 days ago
7

Bryce wrote the linear regression equation (Y=1.123x-6.443 to predict arm span,y,of a person who is x inches tall Riley has an a

rm span of 67.5 inches. Which is the best prediction of riley's height?
A:54.36
B:65.84
C:66.55
D:69.36​
Mathematics
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What proportion of these candy bars have more than 300 calories per serving? (Round your answer to two decimal places.)
Inessa [12570]

Answer: 0.12

Step-by-step explanation:

There are a total of 65 candy bars. Within this amount;

2 candy bars contain 300 to 350 calories

1 candy bar contains 350 to 400 calories

4 candy bars contain 400 to 450 calories

1 candy bar contains 450 to 500 calories

Thus, the overall ratio of candy bars with more than 300 calories is;

= (2 + 1 + 4 + 1) / 65

= 8/65

= 0.12

3 0
3 months ago
Stackable polystyrene cups have a height h1=12.5 cm. Two stacked cups have a height of h2=14 cm. Three stacked cups have a heigh
AnnZ [12381]

Answer:

Approximately 59 stacked cups.

Step-by-step explanation:

We have the following measurements:

Height of one cup = 12.5 cm,

Height of two cups stacked = 14 cm,

Height of three cups stacked = 15.5 cm,

...and so on.

This situation can be described by an arithmetic sequence,

12.5, 14, 15.5,....

The first term is defined as a = 12.5,

with a common difference of d = 1.5 cm.

Thus, the height of x stacked cups is given by

h(x) = a+(x-1)d = 12.5 + (x-1)1.5 = 1.5x + 11

As per the problem,

h(x) = 200

⇒ 1.5x + 11 = 200

⇒ 1.5x = 189

⇒ x = 59.3333333333 ≈ 59.

Therefore, you will need approximately 59 stacked cups.

3 0
3 months ago
Read 2 more answers
Which of the following are true statements about a 30-60-90 triangle? Check all that apply.
Inessa [12570]

Answer:

C. The hypotenuse measures twice the distance of the shorter leg.

B. The longer leg is √3 times the length of the shorter leg.

Step-by-step explanation:

A 30-60-90 triangle is considered a right triangle. Triangles containing a right angle are classified as right triangles. Only one right angle can exist in such a triangle. The representation of this case is illustrated below. Let’s clarify why the proposed statements are valid:

The hypotenuse of a right triangle is always opposite to the right angle. If we designate a as the shorter leg, the sine law affirms that the hypotenuse is:

\frac{H}{sin90}=\frac{a}{sin30} \\ \\ \frac{H}{1}=\frac{a}{0.5} \\ \\ \boxed{H=2a}

This indicates that the hypotenuse is double the length of the shorter leg

The longer leg, which we can call x, can be determined with the Pythagorean Theorem:

H^2=x^2+a^2 \\ \\ x=\sqrt{H^2-a^2} \\ \\ x=\sqrt{(2a)^2-a^2} \\ \\ x=\sqrt{4a^2-a^2} \\ \\ x=\sqrt{3a^2}=\sqrt{3}a

Thus, it is accurate that the longer leg is √3 times longer than the shorter leg.

3 0
2 months ago
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You are arranging a long weekend retreat for your company's executives. You choose two different ski resorts to find the best de
Svet_ta [12734]
Monster Ski is preferable as Super Ski requires lessons for three days, more than two days, costing over $380 including lessons and travel. On the other hand, Monster Ski's prices are $75 an hour, leading to a total of $300 for 2 hours, and slightly over $305 considering the travel expenses.

5 0
2 months ago
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