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3 years ago

Find the sum: –1.54 + 5.093 ...?

Mathematics

2 answers:

Dvinal [7]3 years ago

7 0

3.553 use a calculator

fgiga [73]3 years ago

4 0

The answer is 3.553. Since -1.54 is lacking the thousandth's part, insert 0 in it to match the 5.093 thus arriving at the equation -1.540 +5.093 = x. Then sum it up. you'll arrive at the answer 3.553, with the positive sign because of 5.093 is greater than 1.54

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2. The airplane will crash into the ground after 5 seconds.

3. The domain of the function is [0,30] and range of the function is $[-\infty,900]$ .

Step-by-step explanation:

Ariana initial attempt is modeled by the function,

$h(x)=x^2-12x+35$

where, h is the height in feet and x is the time in seconds of the paper airplanes path.

If airplane crash into the ground, then $h(x)=0$ ,

$0=x^2-12x+35$

$0=x^2-7x-5x+35$

$0=x(x-7)-5(x-7)$

$0=(x-7)(x-5)$

Equate each factor equal to 0.

$x=5,7$

Therefore the airplane will crash into the ground after 5 seconds.

The height of the rocket in meters is modeled by the function shown below, where t is time in seconds.

$h(t)=-4t^2+120t$

The value of t must be positive because time can not be negative.

Find the zeros of the function.

$0=-4t(t-30)$

$t=0,30$

The leading coefficient is negative, so the it is a downward parabola. Since the zeros of the function are 0 and 30, therefore the function is negative before 0 and after 30.

The height can not be negative, so the domain of the function is

$0\leq t\leq 30$