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3 years ago

I need help with this

Mathematics

1 answer:

Phoenix [80]3 years ago

7 0

Answer:

what do you need help with

Step-by-step explanation:

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Select the correct answer. Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What

vivado [14]

Answer:

Step-by-step explanation:

A. 4.2E6 because when putting a number into scientific notation, you would want one number in front of the decimal place and then the trailing numbers would follow. The exponent or E stand for how many numbers are after the decimal, which in this case would be 6.

4,200,000 → 4.2 x 10^6 which is equal to saying 4.2E6

Tip: If the exponent is negative than the decimal would go in the opposite direction. For example:

4,200,000 → 4.2 x 10^-6 would not equal each other because 4.2 x 10^-6 means 0.000004, six numbers would be behind the decimal.

8 0

3 years ago

A bank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. He decides to make a

prisoha [69]

Answer:

To earn $10 in 1st month, the principal must be $4,000.

No, the poster cannot claim that "Open an account of $2 comma 500 and earn at least $10 interest in 1 month!".

Step-by-step explanation:

We have been given that a bank manager wants to encourage new customers to open accounts with principals of at least $2,500. He decides to make a poster advertising a simple interest rate of 3%. We are asked to find the principal to advertise that one can earn $10 the first month.

We will use simple interest formula to solve our given problem.

$I=Prt$ , where,

I = Amount of interest,

P = Principal amount,

r = Annual interest rate in decimal form,

t = Time in years.

$r=3\%=\frac{3}{100}=0.03$

1 month will be equal to $\frac{1}{12}$ .

$\$10=P\cdot0.03\cdot \frac{1}{12}$

$\$10=0.0025P$

$\frac{\$10}{0.0025}=\frac{0.0025P}{0.0025}$

$P=\$4000$

Therefore, to earn $10 in 1st month, the principal must be $4,000.

Now, we will check if an account of $2,500 can earn at least $10 interest in 1 month.

$I=\$2500\cdot 0.03\cdot \frac{1}{12}$

$I=\$6.25$

Since the account earns an amount of $6.25 in one month, therefore, the poster is not true.

4 0

3 years ago

Find the missing measure

SCORPION-xisa [38]

Answer:

93 degrees

Step-by-step explanation:

first, lets add 38+49 to see the sum

38+49=87

since the sum of all three angles in every triangle equals 180, we can subtract this sum from 180 to get the answer

180-87=93

so the missing angle would be 93

6 0

2 years ago

Read 2 more answers

A rectangular garden has a length that is six feet more than twice its width. It takes 120 feet of fencing to completely enclose

vichka [17]

Step-by-step explanation:

let width = w then length, l = 2w + 6

$2w + 2(2w + 6) = 120$

a rectangular garden has two pairs of equal parallel sides 2w and 2l. here we multiply 2 by the width and 2 by the length which is given as 6 more than twice the width or 2w + 6. we then add these sides to get 120

$2w + 2(2w + 6) = 120 \\ 2w + 4w + 12 = 120 \\ 6w + 12 = 120 \\ 6w + 12 - 12 = 120 - 12 \\ 6w = 108 \\ \frac{6w}{6} = \frac{108}{6 } \\ w = 18$

check

$width = w = 18\\ length \: l = 2w + 6 = 2(18) + 6 = 42\\ w + w + l + l = 120\\ 2w + 2l = \\ 2(18) + 2(42) = \\ 36 + 84 = 120$

7 0

2 years ago

PLZ HURRY WILL MARK BRAINLIEST The temperatures of three commercial freezers are as given. −13°F< −12°F<−9°F Select from t

rjkz [21]

-13 is colder, -9 is warmer

8 0

3 years ago