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3 years ago

What do you get when you cross the Atlantic with the titanic

Mathematics

2 answers:

mars1129 [50]3 years ago

7 0

is this a joke???? you get nothing cause the titanic didn't cross the atlantic

n200080 [17]3 years ago

3 0

A big mess in the ocean

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Keith bought 4 shirts for $36 at this rate what would his cost be for 7 shirts

Norma-Jean [14]

Answer:

$63

Step-by-step explanation:

we know that

Keith bought 4 shirts for $36

using proportion

Find out would be the cost for 7 shirts

Let

x ----> the cost for 7 shirts

$\frac{4}{36}\ \frac{shirts}{\$}=\frac{7}{x}\ \frac{shirts}{\$}\\\\x=36(7)/4\\\\x=\$63$

3 0

3 years ago

9.9 ft 7.2 ft The figure above shows a movie screen with dimensions shown in feet. What is the length of the diagonal of the scr

Temka [501]

Answer:

12.2

Step-by-step explanation:

use the Pythagorean theorem to determine the diagonal

9.9^2 + 7.2^2 = d^2

d = 12.2

3 0

2 years ago

A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit

sergiy2304 [10]

Answer:

95% Confidence interval: (39.43, 61.58)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = $50.50

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation = 20

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.1447$

$=50.50 \pm 2.1447(\dfrac{20}{\sqrt{15}} ) \\\\= 50.50 \pm 11.0751 \\= (39.4249,61.5751)\\\approx (39.43, 61.58)$

95% Confidence interval: (39.43, 61.58)

8 0

3 years ago

A rectangular mural has dimensions of (x + 10) and (x + 3) feet. If the area of the mural is 60

Crank

Answer:

Dimensions are 12 , 5

Step-by-step explanation:

Area of rectangular mural = length * width

length * width = 60 square feet

(x + 10)(x + 3) = 60

Use FOIL method

x*x + x*3 + 10*x + 10*3 = 60

x² + <u>3x + 10x</u> + 30 = 60 {Combine like terms}

x² +<u> 13x</u> + 30 - 60 = 0

x² + 13x - 30 = 0

Sum = 13

Product = -30

Factors = 15 , -2 (15+ (-2) = 13 ; 15*(-2) = -30)

x² + 15x - 2x - 30 =0 {Rewrite middle terms}

x(x + 15) - 2(x + 15) = 0

(x + 15)(x - 2) =0

x - 2 = 0 {Ignore (x +15) as dimensions wont have a negative value}

x = 2

x + 10 = 2 + 10 = 12

x + 3 = 2 + 3 = 5

Dimensions are 12 , 5

3 0

2 years ago

Can someone help me with this and make sure to explain (8th grade math)

Naily [24]

<h2><u>Answer:</u></h2><h2> $\boxed{439.82}$ </h2><h2 /><h2><u>Solution Steps:</u></h2>

____________________________

<h3>1.) To find lateral surface the formula is: </h3>

$2$ π $r$ × $h$

$2$ π $7$ × $10$

<h3 /><h3>2.) Solve:</h3>

$2$ π $7$ × $10=439.822972$

<h3 />

____________________________

<h3 />

8 0

2 years ago