Write √−20 in simplest radical form

2i√5

Step-by-step explanation:

Since √-20 is negative and therefore is not a real number, first change it to i√20, to resolve this. Next, find the two closest factors of 20:

1, 20

2, 10

4, 5

Then factor them once again:

2, 2, 5

After this, you get that √20= √2*√2*√5. With this, combine the two √2 to get 2 *√5. Lastly bring back the imaginary letter i, to get 2i√5.

Hope that helps.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

$30.32

step-by-step explanation:

65.00*.12=2.80

65.00-2.80=57.20

57.20*1.06=60.632

60.632/2=30.316