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3 years ago

A regular triangular pyramid has slant height 6 cm and base edges of length 15 cm. Find: Volume and surface area of the pyramid

Mathematics

1 answer:

just olya [345]3 years ago

7 0

Step-by-step explanation:

the number of members in A municipal corporation depends upon the _______ city

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1/8x-5/6=2x solve for X

SVETLANKA909090 [29]

Answer:

x= -4/9

Step-by-step explanation:

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3 0

3 years ago

A 99% confidence interval for the sugar content (per 5 oz. serving) of a shipment of strawberries is 5.9 to 8.3 grams.

gavmur [86]

Answer:

Sample mean = 7.1

Margin of error = 0.465

Step-by-step explanation:

Formula for confidence interval is;

CI = x¯ ± zE

Where;

x¯ is sample mean

z is critical value at confidence level

E is margin of error.

z for 99% Cl is 2.58

We are told the CI is 5.9 to 8.3.

Thus;

5.9 = x¯ - 2.58E - - - - (1)

8.3 = x¯ + 2.58E - - - - (2)

Add both equations together to get;

14.2 = 2x¯

x¯ = 14.2/2

x¯ = 7.1

Put 7.1 for x¯ in eq 1 to get;

5.9 = 7.1 - 2.58E

7.1 - 5.9 = 2.58E

E = 1.2/2.58

E = 0.465

5 0

3 years ago

brian makes an investment in his company’s stock . what does the stock chart say about the stock price today? The down arrow ind

Ivan

Answer:50$ and 2

Step-by-step explanation:

3 0

2 years ago

In a circle with radius 9, an angle measuring pi over 3 radians intercepts an arc. Find the length of the arc in simplest form

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

6 0

3 years ago

You purchased a rare painting for $150 that is increasing in value by 3% annually. How many years will it take until it is doubl

Ahat [919]

Answer:

23 years.

Step-by-step explanation:

It is given that the initial price of painting is $150 and its values increasing by 3% annually.

We need to find how many years will it take until it is doubled in value.

The value of painting after t years is given by

$y=150(1+0.03)^t$

$y=150(1.03)^t$

The value of painting after double is 300. Substitute y=300.

$300=150(1.03)^t$

Divide both sides by 150.

$2=(1.03)^t$

Taking log both sides.

$\log 2=\log (1.03)^t$

$\log 2=t\log (1.03)$

$t=\dfrac{\log 2}{\log (1.03)}$

$t=23.44977$

$t\approx 23$

Therefore, the required number of years is 23.

6 0

3 years ago