(04.05)marcus spent 10 hours doing his homework last week. this week he spent 11 hours doing homework. he says that he spent 110% more time doing homework this week. is he correct? show your work to justify your decision.

Marcus spent 10% more time doing homework this week. His calculation is wrong.

Time used last week by marcus = 10 hours

Time used this week by marcus = 11 hours

Difference in hours  = 11  - 10  = 1 hour

This means that Marcus used 1 more hour this week than last week

% increase = 1/10 * 100

% increase  = 10%

This shows that he spent 10% more time doing homework this week.

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No

Step-by-step explanation:

11-10 = 1

He spent 1 hour more this week

Which is:

1/10 × 100 = 10% more

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct