Problem of the week

Problem:

Manny Kerr runs a company that specializes in grooming and caring for lawns. Manny has a push mower and a powerful riding mower. At one location it takes him 5 hours to cut the entire lawn with the push mower but only 70 minutes with the powerful riding mower.

After 90% of the lawn was cut using the powerful riding mower, the remainder was cut using the push mower.

How many minutes did it take Manny to cut the entire lawn?

Solution:

Step 1:

What I know:

-I know that Manny has a push mower and a powerful riding mower

-At 1 location it takes; 5 hours for push mower, 70 mins for riding mower

-90% of lawn was cut using powerful riding mower

-Rest was cut using push mower

What I want to know:

How many minutes did it take Manny to cut the entire lawn?

Step 2:

Plan:

First we have to find 90% of 70 mins for the powerful riding mower. In order to do that we have to convert the percent into a decimal and multiply it. If I divide the decimal, I will get a higher number, so multiplying it would make the number lower. After I find that, since we used 90%, the remaining percentage would be 10%. So I would convert 10% into a decimal and then find 10% out of 5 hours. For this to be easier to calculate we have to convert the hours into minutes so I would multiply how ever minutes there are in a hour by 10% to find that answer. Once that is finished, I will add both answers together to reach the total time it takes to mow the lawn.

Step 3:

Carry out the plan:

90% of 70

90%=90/100=9/10=0.9

0.9x70=63

63 is 90% of 70

5 hours=how many minutes?

1 hour=60 mins

So 5 hours=5x60

5x60=300

There are 300 mins in 5 hours.

10% of 300

10%=10/100=1/10=0.1

0.1x300=30

30 is 10% of 300

Now let’s add them all up.

30+63=93

It took Manny 93 minutes to mow the entire lawn.

Step 4:

Recheck

93-30=63 OR 93-30=63

300/30=0.1 OR 0.1/30=300

300 mins=how many hours

300/60 (Since there are 60 mins in one hour)=5

5 hours=300 mins

70/63=0.9 OR 0.9/63=70

0.9=9/10=90/100=90%

0.1=1/10=10/100=10%

10% is the remainder out 100% from 90%.

Step 5:

Conclusion

In conclusion, it takes Manny Kerr 63 minutes to mow 90% of the lawn with the Power Riding Mower and 10% of the lawn with the Push Mower.

Speech Competition (First paragraph)

(Girl one [Normal]): Oh my god, look, it’s her! *points finger*

(Girl two [British accent]): Ugh! She’s SO LAME!

(Girl one): Come on girls! Let’s have a little fun.

I was walking back home from school thinking that the school day is FINALLY done. Then she walked in front of me.

(Girl three [Sassy girl accent]): And where do you think you’re going?

(Me [Shy girl accent]): Um…...I’m just going home.

I tried to move past them. I tried to ignore them before things got worse.

(Girl two): *Stands in her way* Oh no you don’t! We’re not done playing with you yet.

She shoves me into the mud. My glasses may have fallen, but I can still see the smirks on their faces.

(Girl one): Let’s give you the treatment that people like you deserve!

She stared beating me up. Then one by one, the rest joined. It was either kicking me or kicking mud on my face.

(Each girl one by one): Get lost NERD! FREAK! Go burn in hell! Just go die!

I couldn’t bare it anymore! I picked up my glasses. I don’t care about my bag; I don’t care how I looked. RUN! I just wanted to run! I was running street by street all the way to my house. I unlocked the door and practically flew in. I ran upstairs, past my baby brother’s room and into the bathroom. I checked the mirror, I looked like a mess! Those girls were right; I AM a loser! Their words kept ringing in my head; “NERD! FREAK! Why do you even bother?! People like you! Just go die!” They weren’t stopping, (Gradually getting louder) get these stupid voices out of my head! I started to cry. “IT BURNS!!!! IT’S BURNING RIGHT HERE!!!! *Gestures to heart* WHY ME?! WHY IS IT ALWAYS ME?!” I saw a pocket knife on the sink. I slowly picked it up…opened it…and then…...