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4 years ago

A rectangle has perimeter P, length l and width w. Which of the follwoing represents l in terms of P and w?

SAT

1 answer:

Ann [662]4 years ago

5 0

Answer: L=P/2-W

Explanation:

The definition of a perimeter is the total distance around a polylon. That means you add all of the side together to find the total distance of a polygon.

First we use the formula of the perimeter of the rectangle. In a rectanble, there are two sides that are L lenght and there are two sides that are W, width.

Then we from the perimeter which is W+W+L+L. Then you combine like terms. W+W+L+L=2W+2L=P

Now you are ready to solve to L.

2L+2W=P

2(L+W)=p

L+W=P/2

L=P/2-W

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Scilla [17]

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Therefore, option B is correct:

B. I would calculate the difference between the observed outcome (Y) and the predicted value of Y (Y_hat), square each one of these differences, and add them up.

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3 years ago

a person jogs 4.0KM in 32 min, then 2.0n in 22min and finally 1.0km 16 min. what is the joggers average speed in km per min? ple

Marta_Voda [28]

Speed= distance divided by time so s=d/t

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3 years ago

The maximum activity level (which is 1.00) of an enzyme occurs at a pH level of 4 pH units.

Zanzabum

Answer:

O2 affinity depends on the pCO2 and pH.

Higher pH -> Higher O2 affinity -> Higher O2 saturation at higher pH level

Higher pCO2 -> Lower O2 affinity -> Higher O2 saturation at lower pCO2 level

This is a benefit because it allows the affinity of Hb in venous blood conditions (lower pO2, higher pCO2, and lower pH) to be much lower than in arterial conditions. Therefore, when blood goes from arterial to venous, the oxygen concentration decreases much more dramatically due to more oxygen (around 2x) being released to the tissues, which is possible due to the changes in affinity caused by the Bohr effect.

Explanation:

please give brainliest

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3 years ago

Newton’s law of cooling states that for a cooling substance with initial temperature t0, the temperature t(t) after t minutes ca

antoniya [11.8K]

The cooling rate of the substance is approximately 0.0732.

According to the statement, the Newton's law of cooling is defined by the following formula:

$T(t) = T_{s} + (T_{o}-T_{s})\cdot e^{-k\cdot t}$ (1)

Where:

$T_{s}$ - Final temperature, in degrees Celsius.
$T_{o}$ - Initial temperature, in degrees Celsius.
$t$ - Time, in minutes.
$k$ - Cooling rate, in $\frac{1}{min}$ .
$T(t)$ - Current temperature, in degrees Celsius.

Please notice that substance reaches thermal equilibrium when $T(t) = T_{s}$ , that is when temperature of the substance is equal to the temperature of surrounding air.

If we know that $T_{o} = 80\,^{\circ}C$ , $t = 15\,min$ , $T_{s} = 50\,^{\circ}C$ and $T(15) = 60\,^{\circ}C$ , then the cooling rate of the substance is: