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3 years ago

12

jim pays $75 per month for his cell phone plan plus $0.30 per minute beyond the first 1000 minutes his bill was $105.60 last mon

th how many minutes did he use

1 answer:

cluponka [151]3 years ago

7 0

The answer to the question

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A social psychologist interested in cultural differences compared women of two ethnic groups on a Role Approval Index on which h

Levart [38]

Answer:

a. 5.26

Step-by-step explanation:

As, the standard deviation of the distribution of the difference between mean is 0.76 so the t score will be simply calculated by dividing the difference of means by standard deviation of the distribution of the difference between mean as hypothesized difference is zero.

t score=Xbar A- Xbar B/Sd of difference of means

t score=55-51/0.76

t score=4/0.76=5.26

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3 years ago

Teddy is selling cookie dough and popcorn for a fundraiser. Cookie dough is $10 and popcorn is $6. Teddy sold 87 items for a tot

raketka [301]

Teddy sold 64 containers of cookie dough

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3 years ago

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3. Write 13 tens as hundreds<br>and tens.<br>I hundreds 3 tens

beks73 [17]

Answer:

1 ten and 3 ones

Step-by-step explanation:

ten + three is 13. Hence, one ten and three ones.

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3 years ago

Find a12 of the sequence 1/4, 7/12, 11/12, 5/4

UNO [17]

1/4 = 3/12, and 5/4 = 15/12, so it looks like there's a common difference between terms of 4/12 = 1/3. The the $n$ -th term in the sequence is given recursively by

$\begin{cases}a_1=\frac14\\a_n=a_{n-1}+\frac13&\text{for }n>1\end{cases}$

By substitution, we get

$a_n=a_{n-1}+\dfrac13\implies a_n=\left(a_{n-2}+\dfrac13\right)+\dfrac13$

$a_n=a_{n-2}+\dfrac23$

and doing this again and again until we stop with an expression containing $a_1$ , we find that

$a_n=a_1+\dfrac{n-1}3$

$a_n=\dfrac{4n-1}{12}$

Then the 12th term in the sequence is

$a_{12}=\dfrac{4\cdot12-1}{12}=\boxed{\dfrac{47}{12}}$

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3 years ago

Hazel is putting together charm bracelets. For each bracelet she uses 1/5 of a yard of string and 12 charms. Hazel has 5/8 if ya

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3 years ago