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3 years ago

13

Increase £500 by 3.2% how do you work it out

1 answer:

yan [13]3 years ago

8 0

£500·(1+3.2%)=£500 + £500·3.2%=£500 + £500·3.2/100 = £500 + £5·3.2 = £500 + £16=£516.

Green eyes.

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The difference between the solutions to the equation x2 =a is 30 what is a ?

Mademuasel [1]

Given equation is $x^2 = a$

In general solution of $x^2 = b$ is $x = + \sqrt{b}$ and $x = - \sqrt{b}$

So the solution of given equation is $x = + \sqrt{a}$ and $x = - \sqrt{a}$

Now difference between them is 30.
So we can write
$\sqrt{a} - (- \sqrt{a}) = 30$
$\sqrt{a} + \sqrt{a} = 30$
$2 \sqrt{a} = 30$
$\sqrt{a} = 15$

On squaring both side
$( \sqrt{a})^2 = (15)^2$
$a = 225$

4 0

4 years ago

4. James and Terry open a savings account that has a 2.75% annual interest rate, compounded monthly. They

Zinaida [17]

$ 159,744.59 will be in the account after 20 years.

Answer: Option A

<u>Step-by-step explanation:</u>

Need to find out the amount present in the account after 20 years. The formula to find out the future value is,

$\text {Future value}=p \times\left(\frac{\left(1+\frac{r}{n}\right)^{n t}-1}{\frac{r}{n}}\right)$

Here

p : amount deposit monthly =$500

r : rate of interest = $\frac{2.75}{100}$ = 0.0275

n : 12(compound monthly)

t : time =20

By substituting all the given datas in the above equation, we get

$\text { Future value }=500 \times\left(\frac{\left(1+\frac{0.0275}{12}\right)^{240}-1}{\frac{0.0275}{12}}\right)$

$\text {Future value}=500 \times\left(\frac{(1+0.002291)^{240}-1}{0.002291}\right)=500 \times\left(\frac{(1.732)-1}{0.002291}\right)$

$\text { Future value }=500 \times\left(\frac{0.732}{0.002291}\right)=500 \times 319.511=\$ 159,744.99$

3 0

3 years ago

What is the answer for this 3/8% as a fraction

lianna [129]

3 / 8 % = ( 3 / 8 ) / 100 = ( 3 / 8 ) * ( 1 / 100 ) = 3 / 800 ;

6 0

4 years ago

Read 2 more answers

if a supplement of an angle has a measure 78 less than the measure of the angle, what are the measures of the angles?

Citrus2011 [14]

Answer:

x + x -78= 180

2x - 78= 180

2x = 258

x = 129

x-78= 51

7 0

3 years ago

Walking briskly consumes 250 calories in 1 hour. How long would you have to walk briskly to lose 3 pounds?

Furkat [3]

Answer:

42 hours

Step-by-step explanation:

1 pound = 3,500

3,500 × 3 = 10,500

1 hour = 250

10,500 ÷ 250 = 42

42 hours

4 0

3 years ago