Question

An element with the mass 330 grams decays by 25.5% per minute. HOW MUCH OF THE ELEMENT IS REMAINING AFTER 5 MINUTES, TO THE NEAREST 10TH OF A GRAM.

Answer 1

Answer:

Equation: 330-.255(5)=X. Multiply: .255(5)=1.275, 330-1.275=X. Subtract: 330-1.275=328.725 or 328.73 :)

Step-by-step explanation:

Mark this answer brainlist

Answer 2

The element remaining after 5 minutes will be 75.7 grams.

Given:

mass of an element = 330 grams

rate of decay = 25.5%

To Find:

the amount of element that is remaining after 5 minutes

Solution:

after 1 minute, the element remaining will be = 330 - (25.5/100 × 330)

= 330(1 - 0.255)

after 2 minutes, the element remaining will be = 330(1 - 0.255)(1 - 0.255)

= 330(1 - 0.255)²

thus, after 5 minutes, the element remaining will be = 330(1 - 0.255)⁵

= 330(0.745)⁵

= 330 × 0.2294

= 75.7

Thus, the element remaining after 5 minutes will be 75.7 grams.

#SPJ3