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A 3 hour river cruise |
2016-05-06 |
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From Jan:
A 3 hour river cruise goes 15km upstream and then back again.The river has a current speed of 2km/h.what is the boat's speed and how long was the upstream journey?
Answered by Penny Nom. |
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A six digit code |
2016-05-06 |
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From Ralph:
How many combinations are possible if a "safe" has four buttons and you can use a six digit code? (these are just single press buttons..)For example, this could be one possible combination: Button 4 Button 1 Button 1 Button 3 Button 2 Button 4. Thanks!
Answered by Penny Nom. |
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Trigonometry |
2016-04-30 |
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From Joel:
I am bored with what I'm learning in 6th math class and want a challenge. I decided to look at trig. I couldn't find a good resource to teach me. Could someone either explain trig to me or show me a resource? Please don't say I'm too young to learn trig. I just am trying to learn.
Answered by Penny Nom. |
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Converting ml to g |
2016-04-28 |
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From Lerato:
I would like to know which formula should I use to convert ml to g?
Answered by Penny Nom. |
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A patio slab |
2016-04-27 |
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From Heaven:
Allie used 11.7m^3 of cement to make a square patio. If the thickness of the patio is 15 cm,what is the length of the patio?
Answered by Penny Nom. |
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Solve 2^2x + 3(2^x) - 4 = 0 |
2016-04-27 |
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From Lloyd:
Solve the equation 2^2x + 3(2^x) - 4 = 0
Answered by Penny Nom. |
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Covering a site with 6 inches of rock |
2016-04-26 |
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From Carla:
if a pump house that measures 20'x16' sits in the middle of a site that is 50'x60' and you apply crushed rock to the site at depth of 6", how many yards will you need to haul?
Answered by Penny Nom. |
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One million is six percent of what number? |
2016-04-26 |
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From Colleen:
One million is six percent of what number?
Thanks!
Answered by Penny Nom. |
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Dimes and pennies |
2016-04-26 |
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From Renae:
Charity has 42 more pennies than dimes. Hope has 7 times as many pennies than dimes. Hope and Charity have the same number of dimes. Together they have $5.46. How many dimes and pennies do each have?
Answered by Penny Nom. |
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sin 2x - sin x = 0 |
2016-04-24 |
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From lilly:
sin 2x - sin x = 0 0
Answered by Penny Nom. |
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The inverse function for f(x)=2x^2+5x |
2016-04-23 |
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From Ashini:
The inverse function for f(x)=2x^2+5x
Answered by Penny Nom. |
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A triangle inscribed in a circle |
2016-04-22 |
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From Olyana:
I am struggling with this question! Help!
So, there is a circle. In the circle, there is an equilateral triangle inscribed.
Each side of the triangle is 20. There is no other info given, other than
the triangle is inscribed in the circle and the sides of the triangle are 20.
I am supposed to find the radius of the circle! Please help!
Answered by Penny Nom. |
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600(1+0.05)^7 |
2016-04-21 |
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From chelsey:
I am unsure on how to solve this problem, 600(1+0.05) 7 ?
Answered by Penny Nom. |
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Two tax rates |
2016-04-21 |
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From Vishal:
Total amount paid annually $444 for 2014 which is inclusive for tax.
tax rate for first six month is 7% then it is changed to 15% for second six months.
calculate the total basic amount paid before tax.
the basic amount on which tax paid in first and second six month is same.
Answered by Penny Nom. |
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A sector of a circle |
2016-04-21 |
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From mustafa:
In a sector of a circle, the arc length is equal to half the perimeter of a sector.find the area of a sector in terms of r
Answered by Penny Nom. |
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