Question

HELPP ASAP 30 points!!

Answer 1

Explanation:

doubled would be 1000 So A=1000

P=principal, what you started with = 500

r= rate in decimal form =.05

n= number of time it compounds in year, semiannually means 2 times =2

Plug into formula on screen

`1000=500(1 + .05/2)^(2t)` >divide both sides by 500

`2=(1.025)^(2t)` > take ln of both sides

`ln2 = ln(1.025)^(2t)` > use exponent ln rule, bring exponent to front

ln2 = 2t ln 1.025 > divide both sides by ln of 1.025

ln2/ln1.025 = 2 t >divide both sides by 2

(ln2/ln1.025)/2 =t >plug into calc

t=14.0355 years >round

t= 14.0 rounded to tenth