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-Dominant- [34]
2 years ago
12

the total mass of both blocks and marbles is 271grams. if the mass of blocks by themselves is 78g. what will the mass of marbles

be
Mathematics
2 answers:
AveGali [126]2 years ago
6 0
The mass of marbles is 193 g.
GarryVolchara [31]2 years ago
6 0
The marbles mass would be 193(g) grams because, 271-78 would give you the amount of marbles since the total is 271(g) grams.
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Answer:

The ball will be 84 feet above the ground 1.125 seconds and 4.5 seconds after launch.

Step-by-step explanation:

Statement is incorrect. Correct form is presented below:

<em>The height </em>h(t)<em> of an ball that is thrown straight upward from an initial position 3 feet off the ground with initial velocity of 90 feet per second is given by equation </em>h(t) = 3 +90\cdot t -16\cdot t^{2}<em>, where </em>t<em> is time in seconds. After how many seconds will the ball be 84 feet above the ground. </em>

We equalize the kinematic formula to 84 feet and solve the resulting second-order polynomial by Quadratic Formula to determine the instants associated with such height:

3+90\cdot t -16\cdot t^{2} = 84

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By Quadratic Formula:

t_{1,2} = \frac{90\pm \sqrt{(-90)^{2}-4\cdot (16)\cdot (81)}}{2\cdot (16)}

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