ar

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

شائع Word Problems >

In an experiment, the population of bacteria is increasing at the rate of 100% every minute. The population is currently at 50 million. How much was the population of bacteria 1 minute ago?

الحلّ

I n an e x p er im e n t, t h e p o p u l a t i o n o f ba c t er ia i s in cre a s in g a t t h e r a t e o f 100% e v ery min u t e . T h e p o p u l a t i o n i s c u rre n tl y a t 50 mi ll i o n . Ho w m u c h w a s t h e p o p u l a t i o n o f ba c t er ia 1 min u t e a g o ?

الحلّ

Amount before addition : 25

خطوات الحلّ

Translate the problem into an equation:

50 = x + 1 \cdot x

50 = x + 1 \cdot x : x = 25

Amount before addition : 25

أمثلة شائعة

Dalvin is going to invest in an account paying an interest rate of 3.1% compounded annually. How much would Dalvin need to invest, to the nearest dollar, for the value of the account to reach 1,620 in 20 years?1 minus the product of 4 and a number Ten times the sum of a number and 24 is at most 18.Bob deposited \$4000 into an account with 2.4% interest, compounded semiannually. Assuming that no withdrawals are made, how much will he have in the account after 7 years?The sum of two numbers is 12. The sum of their squares is 74. Find the numbers.