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2 years ago

Pls help as fast as u can

Mathematics

2 answers:

Natasha_Volkova [10]2 years ago

8 0

Answer:

Step-by-step explanation:

a)4.67

b) 2.27

do you not have a calculator? :/

Dima020 [189]2 years ago

4 0

Answer:

a. $2.2

b. $2.2

Step-by-step explanation:

Not completely sure if it's right for part b, but 100% sure my answer for part a is right.

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You have quarters and nickels saved in a piggy bank. There is a total of $3.45 in the bank. If you have 70 cents in nickels, how

Lerok [7]

Answer:If I have quarters and nickels saved in my piggy bank I know that 9 quarters is $2.25 and i got 28 nickels that equal up to $3.45

Step-by-step explanation:

4 0

3 years ago

Angie has to fill in a reading log for her English class. She is required to read a total of 10 and 5 over six hours a week. On

JulijaS [17]

Given:

She is required to read a total = $10\dfrac{5}{6}$ hours a week.

Monday she read $1\dfrac{1}{3}$ hours.

Tuesday she read $\dfrac{3}{4}$ of an hour.

Thursday she read 3 hours.

To find:

The total hours does she still need to read in order to get full credit.

Solution:

Total time = $10\dfrac{5}{6}$ hours a week.

Total time she already read $=1\dfrac{1}{3}+\dfrac{3}{4}+3$ hours

$=\dfrac{1\times 3+1}{3}+\dfrac{3}{4}+3$ hours

$=\dfrac{4}{3}+\dfrac{3}{4}+3$ hours

$=\dfrac{16+9+36}{12}$ hours

$=\dfrac{61}{12}$ hours

Now,

Remaining time = Total time - Total time she already read

$=10\dfrac{5}{6}-\dfrac{61}{12}$

$=\dfrac{65}{6}-\dfrac{61}{12}$

$=\dfrac{130-61}{12}$

$=\dfrac{69}{12}$

$=\dfrac{23}{4}$

$=5\dfrac{3}{4}$

Therefore, the required time is $5\dfrac{3}{4}$ hours.

8 0

3 years ago

Suppose that a colony of bacteria starts with 1 bacterium and doubles in number every half hour. how many bacteria will the colo

OverLord2011 [107]

Let $a_n$ represent the number of bacteria after $\frac{n}{2}$ hours.

so

$a_0$ is the number of bacteria after 0/2 = 0 hours

$a_1$ is the number of bacteria after 1/2 hours

$a_2$ is the number of bacteria after 2/2 = 1 hours and so on

so if we list a few terms of this sequence, we have:

$a_0=1$

$a_1=1*2$

$a_2=1*2*2$

$a_3=1*2*2*2$

$a_4=1*2*2*2*2$

so clearly, $a_n$ , the number of bacteria after $\frac{n}{2}$ hours, is equal to $2^{n}$ .

$a_4_8$ is the number of bacteria after

$\frac{n}{2}=\frac{48}{2}= 24$ hours.

Thus, we calculate $a_4_8$ , which is $2^{48}$ .

Answer: the number of bacteria after 24 hours is $2^{48}$ .

3 0

2 years ago

How much interest is earned on a principal of $316 invested at an interest rate of 9%

anzhelika [568]

Answer:

$130.06

Step-by-step explanation:

Interest is calculated as shown;

I = A - P

A is the amount

P is the principal

Given

Principal = $316

Rate R = 9% = 0.09

Time t = 4yrs

Substiutte and get Amount A

A =P(1+r)^n

A = 316 (1+0.09)^4

A = 316(1.09)^4

A = 316(1.4116)

A = 446.06

Interest = 446.06 - 316

Interest = 130.06

Hence the interest is $130.06

4 0

3 years ago

What is the complement of the probability of landing on the number 4 when rolling a number cube?

BartSMP [9]

Step-by-step explanation:

4/6

2/3

.................

8 0

3 years ago