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hard math problems for 6th grade

Question:What is the lateral height of a cone that is 40 at the base and 72 as the height. Also, how do you find the area of the cross section if you cut it from top to bottom. What is the percent decrease in energy consumption from 3510 kw to 1297 kw?

Answers:Diameter of cone = 40 whatevers [units of measurement should have been given to you] So Radius of cone = 20 Height of cone = 72 The lateral height is the hypotenuse of a right angled triangle with the other sides being 20 and 72 So hypotenuse ^2 = 20^2 + 72^2 So lateral height = (20^2 + 72^2) = 74.7 (to nearest tenth) The area of the cross section is triangular with base 40 and perp ht 72 So area of cross section = (1/2) x 40 x 72 = 1440 square whatevers Decrease in energy consumption = 3510 - 1297 = 2213 kw Percentage decrease = [(amount of decrease) (amount of original consumption)] x 100% =(2213 / 3510) x 100 % = 63.05% (to nearest hundredth of a percent)

Question:Ok u need an equation for these 3 and perferably equations like( x%x48=4.8)but its ok.:)sorry im asking its just hard being the big sis ya know babysitting! 1. Ed buys Bill lunch for 14.80. bill insists on paying the tip. ed tells him to leave a 15 percent tip. if bill gives ed a 10.00 bill, how much change should bill receive? 2. at the home cooking resaurant,a family leaves a 15 percent tip for the waiter in the amount of 10.26. what was the cost of the family's food total? 3. brad buys a 10.00 lunch. he means to leave 1.00 as a tip but mistakenly drops a 10.00 bill on the table. what percent of the food bill did brad leave as a tip? its ok if you cant answer all of them:) just plz answer at least one or two problems but try to answer all:) thnx!

Answers:1. Ed buys Bill lunch for 14.80. bill insists on paying the tip. ed tells him to leave a 15 percent tip. if bill gives ed a 10.00 bill, how much change should bill receive? 15% of 14.80 = 0.15 x 14.80 = 2.22 10.00 - 2.22 = 7.78 2. at the home cooking restaurant,a family leaves a 15 percent tip for the waiter in the amount of 10.26. what was the cost of the family's food total? 10.26 = 15% 10.26/15 = 1% = 0.684 0.684 x 100 = 100% = 68.40 3. brad buys a 10.00 lunch. he means to leave 1.00 as a tip but mistakenly drops a 10.00 bill on the table. what percent of the food bill did brad leave as a tip? 100%...

Question:this is for my math project where we have to make up our own math board game based on what we learned this year. So if you kno of any be it multiplying,dividing,subtracting and adding fractions,mode,range,and ratio. Also mine is based on Monopoly & Disney in the square it says 'Solve the Cheshire Cats math problem.'

Answers:Anything involving Word problems, pi, and Long division! ;)

Question:Well I have to do a riddle math sheet. Here is the riddle: What do you call a Palace Window? The letters I have left are: C,AR,T,O,YA,RD,HE,LP,UP,M,AN,E I still have somemore to eliminate, but this is all I could do. Any idea? THE ANSWER is only 10 spaces. HELP I got teh answers from solving for the variable. Its too hard to write it on here though

Answers:You would call it a royal pane. get it? window pane in a palace.