MATHEMATICS HIGH SCHOOL

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What do these all mean???

Answers

Answer 1
Answer: They all are from the cryllic alphabet. Hope this helped!

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How would I complete this equation? (7a+3)+(-a-5)= -16

Write: 4.9x10^-2 as an ordinary number (10^-2 means ten to the power of minus two )

PLZ HELP ME HOMEWORK DUE TOMORROW

Answers

4.9\cdot10^(-2)=4.9\cdot(1)/(100)=4.9:100=0.049

A projectile is fired straight upward with an initial velocity of 400 feet per second. The height of the projectile, h(t), if represented by the function h(t)=-16t^2+400t, where t is the time in seconds. How long does it take the projectile to reach the maximum height?

Answers

Taking into account the definition of maximum, minimum and vertex of a quadratic function, it takes 12.5 seconds for the projectile to reach maximum height.

A quadratic function is defined in the form:

y= f (x) = ax² + bx + c

Every quadratic function has a maximum or a minimum, which is the vertex of the parabola. If the parabola has an upward concavity, the vertex corresponds to a minimum of the function; whereas if the parabola has concavity downwards, the vertex will be a maximum.

That is, if the coefficient a is positive the parabola is concave and the vertex will be a minimum of the function, while if a is negative the parabola will be convex and the vertex is a maximum.

The maximum or minimum is reached in xv=(-b)/(2a)  

The maximum or minimum value of y is obtained by evaluating the function at xv, this is, f (xv).

In this case, the function is:

h(t)= -16t² + 400t

where t is the time in seconds

Being a = -16 and b = 400, the value of a is negative, so the vertex will be the maximum.

You want to know the time it takes for the projectile to reach the maximum height, that is, the maximum in t. That is, you must calculate t using the expression: t=(-b)/(2a)

So: t=(-400)/(2x(-16))

Solving:

t=(-400)/(-32)

t= 12.5 seconds

It takes 12.5 seconds for the projectile to reach maximum height.

Learn more about cuadratic function with this examples:

Answer:

You can find the answer by using the formula x=-b/2a

Step-by-step explanation:

Remember the maximum height will be at the vertex. The x value of the vertex is your time, so use x=-b/2a. Then if it had also asked what the height was, you would plug that answer into your equation to find the y value of the vertex. Pretty sure your teacher is just asking you to find the x though:)

How old would someone be if they were born on the 30th october 1992 ????

Answers

today is March, 19th 2016
so from 1992 have been: 2016 - 1992 = 24 years
but the date is from October 30th, so we are not at 24 years just yet, we are at 23 years and the months and days since last 30th October, that is:
November + December + January + February = 4 months
and some days more, 19 days because today is 19th, so the total is:
23 years, 4 months, 19 days
simple its 2016 and they are born on 1992 so 2016-1992 = 24. but there birthday is in October so they will be 23

Which is greater 2/3 or 2/6

Answers

2/3 because 2/6 would equal 1/3
Find the common denominator 

2/3--->4/6

2/6--->2/6

4/6 is greater than 2/6.

2/3 is greater than 2/6.

Unsaved Find the surface area of a conical grain storage tank that has a height of 46 meters and a diameter of 16 meters. Round the answer to the nearest square meter.

Answers

The formula for the surface area of a cone is SA= \pi r(r+ √(h^2+r^2) ).  Filling in accordingly, we have SA= \pi (8)(8+ √(46^2+8^2) ) and SA=8 \pi (8+ √(2116+64)).  That will simplify to SA=8 \pi (8+ √(2180) ) and SA=8 \pi (8+46.69047).  If we LEAVE pi in the answer you would have 437.5 \pi which rounds to 438 \pi.  If you multiply pi in, you would have 1375.5 or, rounded, 1376.  Of course those labels are all meters squared.

Molly is wrapping up parts of sandwiches to sell at her sandwich cart. She cuts each sandwich into fourths and then wraps each fourth separately. She says that she wrapped 16 fourths, so she wrapped 16 whole sandwiches. What was Molly's mistake ?

Answers


her mistake was that she was counting all the fourths as a whole sandwich when she really wraped up four sandwiches in total because 16 divided by 4 which is how many she cut it up into is 4 whole sandwiches
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