I need help please and thank you

2.2 * 10 ^7

Step-by-step explanation:

3.4 * 10 ^7 - 1.2 * 10 ^7

Since the exponent is the same we subtract the numbers out front

3.4-1.2 = 2.2

Put back the power

2.2 * 10 ^7

This is still in scientific notation

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt