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irinina [24]
2 years ago
10

Wey wey drops a pencil in her cup and notices that it only fits diagonally. the pencil is 9 centimeters long and the cup is 7 ce

ntimeters tall. what is the diameter of the cup?
please help asap
Mathematics
1 answer:
vesna_86 [32]2 years ago
8 0

Answer:

5.656854249 cm

Step-by-step explanation:

Use the Pythagorean theorem to solve this (assuming that the bottom of the cup is a right angle). a^{2} +b^{2} =c^{2}. a and b are sides, and c is the hypotenuse.

The length of the pencil would be the hypotenuse (c), and how tall the cup is (7 cm) would be one of the sides (a).     The diameter of the cup, would be the other side (b).

Plug this into the Pythagorean theorem to get the equation: 7^{2} +b^{2} =9^{2}. From here, we can find the diameter of the cup by isolating b - remove everything from the left side, but remember, what you do to one side you must do to the other.

First, solve all of the exponents: 49+b^{2}=81

Second, subtract 49 from both sides: b^{2}=32 This cancels out the 49 on the left.

Lastly, square root both sides: x=5.656854249 This cancels out the exponent on the left.

In conclusion, the diameter of the cup is 5.656854249 centimeters.

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The solution set of the inequality x ≥ - 4 using set builder notation and interval notation is {x | x ∈ Z, - 4 ≤ x ≤ ∞ } and [ - 4, ∞ ) respectively.

An inequality in mathematics is a relation that compares two numbers or other mathematical expressions in an unequal way.

A set can be represented by its elements or the properties that each of its members must meet can be described using set-builder notation.

Interval Notation: A set of real numbers known as an interval contains all real numbers that fall inside any two of the set's numbers.

Consider the inequality,

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The solution set using the set builder notation is:

{x | x ∈ Z, - 4 ≤ x ≤ ∞ }

The solution set of the inequality using the interval notation is:

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Learn more about set builder notation here:

brainly.com/question/13420868

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1 year ago
a regular size chocolate bar is 5 4/9 inches long. the king size bar is 3 times as long as the regular size bar. how long is the
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