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Darina [25.2K]
3 years ago
8

The regular price of a watch is $28.25. During a sale, the watch was marked 12% off. What was the price of the watch during the

sale? (5 points)
a
$2.35

b
$3.39

c
$16.25

d
$24.86
Mathematics
1 answer:
zalisa [80]3 years ago
4 0

Answer:

I believe the answer would be D, $24.86

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Easy question for points 1/3 in decimal form ps I know the answer
valina [46]

Answer:

0.3333 (the three continues)

Step-by-step explanation:

If you put 1/3 or 1 divided by 3 in the calculator, then it'll show the decimal form of the fraction.

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3 years ago
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Find the derivative.
krek1111 [17]

Answer:

\displaystyle f'(x) = \bigg( \frac{1}{2\sqrt{x}} - \sqrt{x} \bigg)e^\big{-x}

General Formulas and Concepts:

<u>Algebra I</u>

Terms/Coefficients

  • Expanding/Factoring

<u>Calculus</u>

Differentiation

  • Derivatives
  • Derivative Notation

Basic Power Rule:

  1. f(x) = cxⁿ
  2. f’(x) = c·nxⁿ⁻¹

Derivative Rule [Quotient Rule]:                                                                           \displaystyle \frac{d}{dx} [\frac{f(x)}{g(x)} ]=\frac{g(x)f'(x)-g'(x)f(x)}{g^2(x)}

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

\displaystyle f(x) = \frac{\sqrt{x}}{e^x}

<u>Step 2: Differentiate</u>

  1. Derivative Rule [Quotient Rule]:                                                                   \displaystyle f'(x) = \frac{(\sqrt{x})'e^x - \sqrt{x}(e^x)'}{(e^x)^2}
  2. Basic Power Rule:                                                                                         \displaystyle f'(x) = \frac{\frac{e^x}{2\sqrt{x}} - \sqrt{x}(e^x)'}{(e^x)^2}
  3. Exponential Differentiation:                                                                         \displaystyle f'(x) = \frac{\frac{e^x}{2\sqrt{x}} - \sqrt{x}e^x}{(e^x)^2}
  4. Simplify:                                                                                                         \displaystyle f'(x) = \frac{\frac{e^x}{2\sqrt{x}} - \sqrt{x}e^x}{e^{2x}}
  5. Rewrite:                                                                                                         \displaystyle f'(x) = \bigg( \frac{e^x}{2\sqrt{x}} - \sqrt{x}e^x \bigg) e^{-2x}
  6. Factor:                                                                                                           \displaystyle f'(x) = \bigg( \frac{1}{2\sqrt{x}} - \sqrt{x} \bigg)e^\big{-x}

Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Differentiation

7 0
2 years ago
Drako found an emerald in a cave at a depth between -1/2 and -1 2/3 meters which number could represent the depth which the emer
oksian1 [2.3K]

Answer:

-\frac{3}{4}  meters

Step-by-step explanation:

From the answer choices, we basically need to find which of them is between   -\frac{1}{2}  and  -1\frac{2}{3}

<em>Converting all of them to decimals would make it really easier:</em>

<em />

<em>So we need to find number between -0.5  and -1.67</em>

<em />

<em>Answer choice A is -2.33</em>

<em>Answer choice B is  -0.75</em>

<em>Answer choice C is  -0.25</em>

<em>Answer chioce D is  -1.83</em>

<em />

<em>So which number, from the choices, is between -0.5 & -1.67?</em>

Clearly, it is -0.75, or,  -\frac{3}{4}  meters

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Arte-miy333 [17]
It is rational number because irrational numbers are endless
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3 years ago
Verify seca(1-sina)(seca+tana)=1
beks73 [17]
Seca(1-sina)(seca+tana)=1
Left hand side
=(1-sina) (seca +tana) / cosa
=seca +tana - sinaseca - sinatan / cosa
=seca + tana -tana -(sin^2a/cosa) / cosa
=(1/cosa - sin^2a/cosa) / cosa
= (1-sin^2a / cosa) / cosa
= (1-sin^2a)/ (cos^2a)
=1 (verified)
5 0
3 years ago
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