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3 years ago

13

Betty has $1,000 in her savings account. The interest rate is 2.5%. How much interest will Betty earn when her money has been in

bank for 3 years?

1 answer:

V125BC [204]3 years ago

3 0

Answer:

$1,075

Step-by-step explanation:

Use the formula I=PRT where I= interest, P=principle or starting amount, R=interest rate, T=time

1000*0.025*3=75

Add 75 to 1,000, 1,000+75=1,075

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Marley is an avid birdwatcher and is trying to estimate the number of bluejays living in his region he traps 22 Blue Jays and ta

qwelly [4]

Answer:

15 Blue Jays

Step-by-step explanation:

Number of Blue Jays tagged = 22

Number of Blue jays captured = 550

Estimate of the Blue Jay population = 825

We need to find out how many Blue Jays out of 550 were tagged ones. Remember that in the beginning there were no tagged Blue Jays and Marley tagged 22 of them. This means total number of tagged Blue Jays in the entire population is 22. Rest of the blue Jays are not tagged. Marley calculated the estimated Blue Jay population using the proportions.

Assume that from 550, x Blue Jays were tagged. Out of 825 Blue Jays, 22 are tagged. The proportion of tagged Blue Jays in 550 must be equal to the proportion of tagged Blue Jays in entire population. i.e.

$x : 550 = 22 : 825\\\\ \frac{x}{550}=\frac{22}{825}\\\\ x=\frac{22}{825} \times 550\\\\x =14.7$

Since, the number of Blue Jays cannot be in decimal, we round it up to the nearest integer 15.This means, out of 550 trapped 15 Blue Jays were the tagged ones. Based on this Marley estimated the Blue Jays Population size.

5 0

3 years ago

Help me solve this problem!!PLEASE help I need this answer and I need to know how to solve this by today!!

gogolik [260]

She wants to purchase shoes that cost $ 50
she wants to purchase socks that cost 2.20 each......so the expression for this is 2.20s...with s being the number of pairs of socks bought
and she only has $ 64....so she has to spend 64 or less...< = 64

so ur inequality would be :
50 + 2.20s < = 64.....subtract 50 from both sides
2.20s < = 64 - 50
2.20s < = 14...divide both sides by 2.20
s < = 14 / 2.20
s < = 6.36....so she can purchase 6 pairs of socks without going over

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3 years ago

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Evaluate the following formula for

JulsSmile [24]

Answer:

Step-by-step explanation:

Using provided formula and filling in the variables:

z = $\frac{(0.6-0.7)-(0)}{\sqrt{\frac{0.615782*0.384218}{88}+\frac{0.615782*0.384218}{82} }}$

Filling in in calculator:

z ≈ -1.34

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3 years ago

49<br> 42<br> 35<br> 30<br> 63<br> 6x - 6<br> Solve for x show work

Alex Ar [27]

The correct answer is 49! :) Hope you have a good day

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3 years ago

How do you solve 12x =144

julia-pushkina [17]

1st. Try to make x by itself. Divide 12 on each side.
After it will look like this

x=12

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3 years ago

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