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4 years ago

12

Cards 1 through 20 are mixed up and placed in a bag. James chooses one of the cards without looking. What is the probability tha

t James chooses a card with a number 8 or greater

1 answer:

kirza4 [7]4 years ago

8 0

SO THERE IS 20 JUST GO FROM 8 UP SO IT WOULD BE 8 OUT OF 20

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If ray earns $120 for 15 hours of work, how much will he earn for 20 hours of work at the same rate

ss7ja [257]

Find his rate:

120 / 15 = $8 per hour

Multiply the rate by hours:

$8 x 20 hours = $160

He will earn $160

6 0

3 years ago

10 computer operators can compose 120 pages in 2 hours. How many operators should work, if the same job is to be completed in 30

cupoosta [38]

Answer:

40 Operators

Step-by-step explanation:

if 10 operators worked on 120 pages for 2 hours

P operators will work on the same pages for 30min

note: 2hrs= 120min

10×120min/120= P × 30/120

cross multiply
make P subject of the formula

P= 10×120×120/120×30

P = 40 operators

6 0

3 years ago

Bernard designs motorized bicycles at Smart Gear Technologies. His total earnings are

hichkok12 [17]

Answer:

600

Step-by-step explanation:

4 0

3 years ago

I put $500 in a saving account that earns 6% interest compounded semi-annually. How much interest will be in the account after 2

Nuetrik [128]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$500\\
r=rate\to 6\%\to \frac{6}{100}\to &0.06\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{semi-annually, thus twice}
\end{array}\to &2\\
t=years\to &2
\end{cases}
\\\\\\
A=500\left(1+\frac{0.06}{2}\right)^{2\cdot 2}\implies A=500(1.03)^4\implies A=562.754405$

now, "A" is the accumulated amount, including the earned interest, how much interest was it earned? well, is just A - P.

3 0

3 years ago

Which equation shows a line with a slope of 3 that passes through the point ((1,-2)

qaws [65]

Answer:

y = 3x - 5

Step-by-step explanation:

Slope m = 3

Using (1,-2)

Slope-intercept: y = mx + b

-2 = 3(1) + b

-2 = 3 + b

b = -5

then y = 3x - 5

7 0

3 years ago