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4 years ago

Please help I don’t understand this at all

Mathematics

2 answers:

morpeh [17]4 years ago

7 0

Area of a trapezoid is (base of the top + base fo the bottom)/2 all multiplied by the height(8+6/2)4= (14/2)4=7 x 4=28
So you can do it in the future

blagie [28]4 years ago

4 0

The answer is 28 in.

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The radius of a circle is 4 1/2 inches. What is the circles circumference in terms of 3.14 (pie)

DerKrebs [107]

The circumference of a circle can be found using the equation 2 π r

(2)(3.14)(4.5) = 28.26 (or 28 13/50 if you need it in fractions)

3 0

3 years ago

Find a positive number for which the sum of it and its reciprocal is the smallest (least) possible. Let x be the number and let

Allisa [31]

Answer:

$S(x) = x + \frac{1}{x}$ --- Objective function

Interval = $\{x:x=1\}$

Step-by-step explanation:

Given

Represent the number with x

The required sum can be represented as:

$x + \frac{1}{x}$

Hence, the objective function is:

$S(x) = x + \frac{1}{x}$

To get the the interval, we start by differentiating w.r.t x

<em>Using first principle, this gives:</em>

$S'(x) = 1 - \frac{1}{x^2}$

Equate S'(x) to 0 in order to solve for x

$0 = 1 - \frac{1}{x^2}$

Subtract 1 from both sides

$0 -1 = 1 -1 - \frac{1}{x^2}$

$-1 = - \frac{1}{x^2}$

Multiply both sides by -1

$1 = \frac{1}{x^2}$

Cross Multiply

$x^2 * 1 = 1$

$x^2 = 1$

Take positive square root of both sides because x is positive

$\sqrt{x^2} = \sqrt{1$

$x = 1$

Representing x using interval notation, we have

Interval = $\{x:x=1\}$

To get the smallest sum, we substitute 1 for x in $S(x) = x + \frac{1}{x}$

$S(1) = 1 + \frac{1}{1}$

$S(1) = 1 + 1$

$S(1) = 2$

<em>Hence, the smallest sum is 2</em>

3 0

3 years ago

A class consists of 55% bots and 45% girls. It is observed that 25% of the class are boys and scored an A on the test, and 35% o

oksian1 [2.3K]

Answer:

0.1575

Step-by-step explanation:

Probability of picking a girl is 0.45 and probability of a girl scoring A is 0.35.

Therefore probability of a girl scoring A is 0.45*0.35=0.1575

8 0

3 years ago

The scale in the drawing is 2in:4ft. What are the length and width of the actual room find the area of the actual room

Marizza181 [45]

1:24 get them each doqwn 1 inch 24 inche = 2 feet

6 0

3 years ago

Read 2 more answers

Giving best answer brainliest

kipiarov [429]

Answer:

$365.00

Step-by-step explanation:

P= 300

r= 4/100

t=5

Hence, A= P(1+r)^t

A = 300(1+0.04)^5

A= 300(1.04)^5

A= $364.99587..

Rounded answer would be $365.00

Hope this helps!

Please mark brainliest if you think I helped! Would really appreciate!

8 0

3 years ago

Read 2 more answers