3 years ago

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Mathematics

2 answers:

Gemiola [76]3 years ago

6 0

Answer:

Step-by-step explanation:

quick maths easy 1 apple two apple

Nonamiya [84]3 years ago

5 0

2 please pick me!!!!

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Perform the indicated operation. 22 6/11 ∙ 1 1/2

IrinaK [193]

Answer:

3. 33 9/11

Step-by-step explanation:

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2 years ago

What is the probability that a student who is not in band plays an instrument?

uranmaximum [27]

Answer:

Step-by-step explanation:

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2 years ago

The captain of a boat knows that a lighthouse on the coast is 100 ft

Tatiana [17]

Answer:

Height of the light house $=7.5\ feet$

Step-by-step explanation:

Distance of light house from boat = 100 ft

Angle of elevation from boat to the top of light house = 2°

Height above water while taking measurement = 4 ft

The figure of the situation is shown below.

For Δ ABC

$\tan2\°=\frac {AB}{BC}$

$\tan2\°=\frac {AB}{100}$

$0.035=\frac {AB}{100}$

Multiplying both sides by 100.

$100\times 0.035=100\times\frac {AB}{100}$

$3.5=AB$

∴ $AB=3.5$

Height of the light house $=3.5+4=7.5\ feet$

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2 years ago

A class has 18 students. The teacher asks how many students in the class have pets. If 5/9 of the students have pets, how many s

Masja [62]

10 students would have pets because 10/18 is simplified to 5/9 I think

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2 years ago

A particle moves so that r(t) = ati + b sin atj. Show that the magnitude of the acceleration of the particle is proportional to

ValentinkaMS [17]

Answer:

Step-by-step explanation:

Given

Position of particle is $r(t)=at\hat{i}+b\sin (at)\hat{j}$

i.e. distance from x axis is $b\sin (at)---1$

Distance from y axis at

velocity is given by $v=\frac{\mathrm{d} r}{\mathrm{d} t}$

$v=a\hat{i}+ba\cos (at)\hat{j}$

Similarly acceleration is given by

$a=\frac{\mathrm{d} v}{\mathrm{d} t}$

$a=0\hat{i}-a^2b\sin (at)\hat{j}$

Magnitude of acceleration is $=\sqrt{(-a^2b\sin (at))^2}$

$=a^2b\sin (at)----2$

From 1 and 2 we can see that

Magnitude of acceleration is proportional to distance from x axis

$a\propto distance\ from\ x-axis$

5 0

3 years ago

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