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1 year ago

Emma buys a softball that is 70% off. If the original price is $30, how much does Emma pay?

Mathematics

1 answer:

Korvikt [17]1 year ago

6 0

Answer:

Explanation:

First, we need to find 70% of the original price of $30 using the following equation:

$\text{ \$30 }\times70\text{ \% = \$30 }\times\frac{70}{100}=\text{ \$21}$

It means that Emma pays $21 less than the original price. So, she pays:

$30 - $21 = $9

Therefore, the answer is $9

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Yuri [45]

The value of angle x is 127 degrees.

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The angle x can be found as follows:

Angle on a straight line is 180 degrees.

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yKpoI14uk [10]

Answer: second option.

Step-by-step explanation:

In order to solve this exercise, it is necessary to remember the following properties of logarithms:

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In this case you have the following inequality:

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2. Now you must apply the properties shown before:

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3 years ago

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3 years ago

A block of ice has a square top and bottom and rectangular sides. At a certain point in

Lilit [14]

Answer:

$\frac{dV}{dt} = 360 \ cm^3/h$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Geometry

Volume of a Rectangular Prism: V = lwh

Calculus

Derivatives

Derivative Notation

Differentiating with respect to time

Basic Power Rule:

f(x) = cxⁿ
f’(x) = c·nxⁿ⁻¹

Step-by-step explanation:

Step 1: Define

$l = 30 \ cm\\w = l\\\frac{dl}{dt} = 2 \ cm/h\\h = 20 \ cm\\\frac{dh}{dt} = 3 \ cm/h$

Step 2: Differentiate

Rewrite [VRP]: $V = l^2h$
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Step 3: Solve for Rate

Substitute: $\frac{dV}{dt} = 2(30 \ cm)(2 \ cm/h)(3 \ cm/h)$
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Here this tells us that our volume is decreasing (ice melting) at a rate of 360 cm³ per hour.

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3 years ago

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den301095 [7]

Answer:

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Step-by-step explanation:

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3 years ago