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3 years ago

11

How do you find the critical points on amplitude and period? (Precalculus)

1 answer:

icang [17]3 years ago

6 0

The period of a sine and cosine is 2pi. The amplitude is 1.

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The average person blinks 1,000 time an hour. Using scientific notation, calculate the number of times the average person blinks

fgiga [73]

Scientific notation is
a times 10^b

where
1≤a<10 and
b is a whole number

1000 times 365=365000=3.65 times 100000=3.65 times 10⁵

6 0

4 years ago

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What is 7/9 written as a decimal please explain!!

IrinaK [193]

7/9 as a decimal is 0.777.

7/9 is basically saying 7 divided by 9.
Since 9 doesn't at all go into 7, we have to make a decimal using long division.
So because a decimal isn't a whole number, we put 0.(blank) at the top in place of the regular number.
After, you just continue with the regular long division, but every time the divisor doesn't go into the number from the subtraction, you bring down a zero.

Sorry if this was kind of confusing!
Just watch a video on it if this didn't help.

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3 years ago

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A candle holder is in the shape of a triangular pyramid. The area of the base is 15 in2

EleoNora [17]

The volume of candle holder is 30 inches cubed.

Step-by-step explanation:

Given,

Area of base = A = 15 square inches

Height of candle holder = H = 6 inches

As the holder is in shape of triangular pyramid, therefore,

Volume of candle holder = $\frac{1}{3}AH$

Volume of candle holder = $\frac{1}{3}*15*6$

Volume of candle holder = $\frac{90}{3}=30\ in^3$

The volume of candle holder is 30 inches cubed.

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3 years ago

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A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is given at th

Bogdan [553]

Answer:

95% confidence interval for the average net change is between a lower limit of 11.709 and an upper limit of 30.921.

The critical value that should be used in constructing the confidence interval is 4.303.

Step-by-step explanation:

Confidence interval is given as mean +/- margin of error (E)

mean = (17+20+26)/3 = 63/3 = 21

sd = sqrt[((17-21)^2 + (20-21)^2 + (26-21)^2) ÷ 3] = sqrt(42÷3) = sqrt(14) = 3.74

n = 3

degree of freedom = n-1 = 3-1 = 2

confidence level (C) = 95% = 0.95

significance level = 1 - C = 1 - 0.95 = 0.05 = 5%

critical value (t) corresponding to 2 degrees of freedom and 5% significance level is 4.303.

The critical value is 4.303

E = t×sd/√n = 4.303×3.74/√3 = 9.291

Lower limit of mean = mean - E = 21 - 9.291 = 11.709

Upper limit of mean = mean + E = 21 + 9.291 = 30.291

95% confidence interval is (11.709, 30.391)

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3 years ago

Biggest test ive ever had pls help

Aliun [14]

The third equation is the correct one

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3 years ago

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