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Amanda [17]
3 years ago
15

How many questions do you need to get right on a 10 question test in order to get a 60%?

Mathematics
1 answer:
V125BC [204]3 years ago
5 0

Answer:

this is easy you need to get 6 question right

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The bird population on an island is declining at a rate of 2.2% per year. The population was 3500 in the year 2016. What will be
vovikov84 [41]

Answer:

3,063

Step-by-step explanation:

To find the population in a future year, use the formula:

A = P (1+/-r)^t

where A is the amount, p is the starting population, r is 2.2% or 0.022, and t is the number of years after 2016.

Since the population is decreasing it is subtraction. Here we are finding A, P =3500, r=0.022, and t=6.

A = P (1-r)^t\\A = 3500 (1-0.022)^6\\A=3500(0.978)^6\\A=3,063

3 0
3 years ago
$24000 was deposited in an account. If rate of interest is 15% p.a. compounded annually, then calculate the amount after 2 years
madreJ [45]

Answer:

Principal=P=24,000

Rate of interest=r=15%

Time=n=2

3

1

years

Here first we take n=2years

A=P(1+

100

r

)

n

where A=Amount and n=number of years

A=24000(1+

100

15

)

2

=24000×

100

115

×

100

115

=Rs.31,740‬

The amount after 2 years is Rs31,740‬

Now principal=Rs.31,740‬

Simple interest for last

3

1

year is

100

PRT

=31,740‬×

100

15

×

3

1

= Rs.1,587‬

∴ Amount after 2

3

1

year= Rs.31740+1587= Rs.33,327

C.I =A−P

∴C.I=33,327−24,000=Rs.9,327‬

8 0
3 years ago
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Apex Car Share Inc. offers car sharing for a $119 yearly fee plus $19 per hour for the use of its car share. What is the total c
OLga [1]
19x + 119

Step 1. 42 goes into (x) making it 19(42) + 119

Step 2. solve (19 × 42 = 798) 798 + 199 = 997

so the total cost is 997
8 0
3 years ago
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You can buy pens at a rate of $0.75 per pen. How much is it for 400 pens?
seropon [69]

Answer:

300

Step-by-step explanation:

400 X 0.75 = 300

8 0
4 years ago
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Bobs birthday cake has 16 candles. He cuts it into 8 equal slices and each slice and each has the same number of candles. How ma
elena-14-01-66 [18.8K]

Answer:2

Step-by-step explanation:

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3 years ago
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