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3 years ago

Jana finished 1/4 of her homework at school and 2/3 of it before dinner. Which of the following statements is true?

Mathematics

1 answer:

jonny [76]3 years ago

4 0

<span>c.She has a little homework left to finish.
</span>

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On a hike, Parker noticed that the temperature at the base of a mountain was 64°F. At a point on the mountain that was 2,000 fee

MArishka [77]

Answer:

Step-by-step explanation:

Rate of change of Temperature with height can be given by:

$\frac{dT}{dh} = \frac{T_{top} - T_{bottom}}{h_{top} - h_{bottom} }$

$\frac{dT}{dh} = \frac{58 - 64}{2000} = -0.003 Fahrenheit/ft$

7 0

3 years ago

5x + 1 = 6x - 8 x= como puedo resolverla

vlada-n [284]

Answer:

X = 9

Step-by-step explanation:

5 0

3 years ago

NASA launches a rocket at t=0 seconds. Its height, in meters above sea-level, as a function of time is given by h(t)=−4.9t2+121t

Alenkasestr [34]

NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by

$h(t)=-4.9t^2+121t+283$

The sea level is represented by h = 0, therefore, to find the corresponding time when h splashes into the ocean we have to solve for t the following equation:

$h(t)=0\implies-4.9t^2+121t+283=0$

Using the quadratic formula, the solution for our problem is

$\begin{gathered} t=\frac{-(121)\pm\sqrt{(121)^2-4(-4.9)(283)}}{2(-4.9)} \\ =\frac{121\pm142.083778...}{9.8} \\ =\frac{121+142.083778...}{9.8} \\ =26.8452834694... \end{gathered}$

The rocket splashes after 26.845 seconds.

The maximum of this function happens at the root of the derivative. Differentiating our function, we have

$h^{\prime}(t)=-9.8t+121$

The root is

$-9.8t+121=0\implies t=\frac{121}{9.8}=12.347$

Then, the maximum height is

$h(12.347)=1029.99$

1029.99 meters above sea level.

6 0

1 year ago

Triangles RST and MNP are congruent. Name the congruent sides and the congruent angles.

d1i1m1o1n [39]

Answer:

angles:r=m

s=m

t=p

sides:rs=mn

rt=mp

st=pn

3 0

3 years ago

21.

murzikaleks [220]

Answer:

B. 14.2, 3.2

Step-by-step explanation:

diameter: 9 (count each box as 1)

d/2 = radius --> radius: 4.5

Area of a circle= πr^2

A= 63.6172

A/r = 63.6172/4.5 = 14.1

A/r^2= 63.6172/(4.5)^2 = 3.14

4 0

1 year ago

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