A manatee population decreases by 15 manatees each year for 3 years. Find the total change in the manatee population.

1.89 * 10^12 is a number written in scientific notation. To write a number in scientific notation, you write a number that is 1 or greater and less than 10, and then multiply it by 10 raised to an integer.

1.89 is the number from 1 to under 10.

12 is the integer exponent of 10.

The calculator writes 1.89 * 10^12, the number in scientific notation, as 1.89E12.

Again, 1.89 is the number from 1 to under 10, and 12 is the exponent. The E shows that the number after it is the exponent.

To write 1.89 * 10^-12, the calculator would write 1.89E-12.

The E stands for the exponent of 10 in scientific notation.

The inequality is 23-s≥5 so, option A is correct.

What is inequality?

Inequality is the relationship between two expressions such that those expressions are not equal.

A person spend $s on the food. Determine the amount left for the dessert.

23-s

The amount left should be greater than or equal to $5 so that a person can purchase dessert.

23-s≥5

Thus, the inequality represents the given situation is 23-s≥5.

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Answer:

Option A .

Step-by-step Explanation:

Since dessert is $5, you can spend ____.

$23-$5=$18

The amount of money he can spend before dessert is s.

Since he needs enough money left for dessert, when he uses samount of money from his $23, he should have $5 or more left.

Therefore,

23-smore than or equals to 5.

Answer :

Option A.

Answer: C) a = 2/5

1.7a+0.3a simplifies to 2.0a or just 2a. We have the equation 2a = 4/5. If we multiply each side by 1/2, then we can isolate 'a' fully to get

2a = 4/5

(1/2)*2a = (4/5)*(1/2)

(2/2)a = (4*1)/(5*2)

1a = 4/10

a = 2/5

Step-by-step explanation: