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RUDIKE [14]
2 years ago
14

The Air Quality Index, or AQI, measures how polluted the air is in your city and assigns a number based on the quality of the ai

r. Over 100 is "Unhealthy". The following quadratic regression equation, models the AQI over time, where n represents the number of days the AQI exceeded 100, and t represents the number of years since 1990.
Mathematics
1 answer:
tatuchka [14]2 years ago
3 0

Answer:

it is actually c.135 days on edge just took the test

Step-by-step explanation:

took the test

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A central angle, thata, of a circle with radius 16 inches intercepts an arc of 19.36 inches. Find thata.
kaheart [24]
Theta*
\theta=\frac{19.36}{16}=1.21 radians.
5 0
3 years ago
Read 2 more answers
A coat regularly cost $125 is put on sale for $75
Stels [109]
If a coat is regularly $125, and they mark it down to $75, we could figure out how much money was taken off by subtracting $75, from $125

$125 - $75 = $50

So the coats price was cut by $50.

Hope it helps
Please mark brainliest!
7 0
3 years ago
dos aviones parten de una ciudad con direcciones S32°E y E57°N¿ cuál es el angulo que forma sus direcciones?​
Elan Coil [88]

Answer:

El ángulo formado entre las dos direcciones es aproximadamente 115º.

Step-by-step explanation:

Las direcciones dadas en el enunciado significan lo siguiente:

S32ºE - <em>32º al este del sur.</em>

E57ºN - <em>57º al norte del este.</em>

Vectorialmente hablando, cada dirección es la siguiente:

S32ºE

A(x,y) = (\sin 32^{\circ}, -\cos 32^{\circ})

A(x,y) = (0.530, -0.848)

E57ºN

B(x,y) = (\cos 57^{\circ},\sin 57^{\circ})

B(x,y) = (0.545, 0.839)

El ángulo formado entre los dos vectores unitarios (\theta), medido en grado sexagesimales, puede determinarse mediante la siguiente ecuación vectorial:

\theta = \cos^{-1} \frac{A\,\bullet \,B}{\|A\|\cdot \|B\|}

Donde:

\|A\| - Norma de A(x,y).

\|B\| - Norma de B(x,y).

Si sabemos que A(x,y) = (0.530, -0.848), B(x,y) = (0.545, 0.839), \|A\| = 1 y \|B\| = 1, entonces el ángulo formado entre los dos vectores es:

\theta = \cos^{-1} \frac{(0.530)\cdot (0.545)+(-0.848)\cdot (0.839)}{(1)\cdot (1)}

\theta \approx 115^{\circ}

El ángulo formado entre las dos direcciones es aproximadamente 115º.

4 0
3 years ago
Please answer these questions I will mark brainliest
igor_vitrenko [27]
1. C

2. A

3. A

i’m pretty sure for 1,2. 3 i’m a little iffy but i think it’s A bc “homogenizing”
4 0
2 years ago
62690576946__477ABC1F-59BF-400B-B7A4-FD983DEDEB59.heic
Romashka-Z-Leto [24]

Answer:

uh

Step-by-step explanation:

nndndndjdjejnejdjf is answer

4 0
2 years ago
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