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solong [7]
3 years ago
15

Which one ? please help! I’ll mark brainliest!

Mathematics
2 answers:
iris [78.8K]3 years ago
7 0

Answer:

w ≥ 66

Step-by-step explanation:

You know that anything less than 66 would not cause any effect, so you need something that is exactly 66 or more than 66 for the airbag to deploy.

Thus, w ≥ 66

≥ means that w is more than or equal to 66. (66 and above)

< means that w is less than 66. (65 and below)

> means that w is more than 66. (67 and above)

≤ means that w is less than or equal to 66. (66 and below)

prohojiy [21]3 years ago
4 0

Answer:

w<66 is the answer i believe

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Katena32 [7]

Answer:

2\sqrt{55}\text{ m/s or }\approx 14.8\text{m/s}

Step-by-step explanation:

The vertical component of the initial launch can be found using basic trigonometry. In any right triangle, the sine of an angle is equal to its opposite side divided by the hypotenuse. Let the vertical component at launch be y. The magnitude of 40\text{ m/s} will be the hypotenuse, and the relevant angle is the angle to the horizontal at launch. Since we're given that the angle of elevation is 60^{\circ}, we have:

\sin 60^{\circ}=\frac{y}{40},\\y=40\sin 60^{\circ},\\y=20\sqrt{3}(Recall that \sin 60^{\circ}=\frac{\sqrt{3}}{2})

Now that we've found the vertical component of the velocity and launch, we can use kinematics equation v_f^2=v_i^2+2a\Delta y to solve this problem, where v_f/v_i is final and initial velocity, respectively, a is acceleration, and \Delta y is distance travelled. The only acceleration is acceleration due to gravity, which is approximately 9.8\:\mathrm{m/s^2}. However, since the projectile is moving up and gravity is pulling down, acceleration should be negative, represent the direction of the acceleration.

What we know:

  • v_i=20\sqrt{3}\text{ m/s}
  • a=-9.8\:\mathrm{m/s^2}
  • \Delta y =50\text{ m}

Solving for v_f:

v_f^2=(20\sqrt{3})^2+2(-9.8)(50),\\v_f^2=1200-980,\\v_f^2=220,\\v_f=\sqrt{220}=\boxed{2\sqrt{55}\text{ m/s}}

3 0
3 years ago
Sami's bank account earns 4% simple interest per year. If Sami deposits $500, how much simple interest will she earn in four yea
Oksanka [162]

Answer:

20

Step-by-step explanation:

1% of 500 is 5

5*4(amount of years) = £20

3 0
3 years ago
HELPPP ASAP !!! it’s for a test
Marina86 [1]

Answer:

-4, 1, 2, 3

Step-by-step explanation:

I put them from least to greatest.

4 0
3 years ago
Read 2 more answers
Help me with 3, and 5 show your work !
ss7ja [257]
Okay so for number 3, you have to do the top work first.

3: POSITIVE 2!! first, you do the stuff inside the parentheses first because of P(parentheses)EMDAS. so, 14-2-10! -2-10 is -12 and then plus positive 14 is +2. but, the negative sign outside of the parentheses makes that +2 a -2.
but, you cant forget the -12 outside. you have to do -12-2 which gets you -14. then, this is easy! -14 divided by -7 is a positive 2!

5: POSITIVE 3!! again, do the stuff in the parentheses first!! -2-4 is -6. then, -6 x 2 is -12! so, divide -12 by -4 and you get a positive 3!
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3 years ago
When sizes of pizzas are quoted in inches, the number quoted is the diameter of the pizza. A restaurant advertises an 8-inch “pe
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yes because if they want a bigger pizza or more they can just buy 2 eight inch pizza

Step-by-step explanation:

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8 0
3 years ago
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