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4 years ago

Mario and 3 friends each had 3/4 foot of rope. They needed 5 feet of rope altogether. Do they have enough? Explain.

1 answer:

6 0

They would not have enough because 3/4 times 4 would not equal 5...it would equal 3. Mario and his 3 friends each have 3/4 foot of rope. They needed 5 feet of rope altogether. Do they have enough rope? They would need 2 more feet of rope to complete the 5 feet. But they do not have enough feet of rope to make 5 feet.

hope this helps :D

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Help me! What is the surface area of the triangular prism shaped toy car ramp shown?

dalvyx [7]

Answer:

TRY 416in²

Step-by-step explanation:

front:

8×17=136÷2=68

same for the back

back = 68

side 1=

7×15=105

side 2=

8×7=56

bottom=

17×7=119

68+68+105+56+119=416

8 0

2 years ago

Suppose you want to find the difference of two sinusoidal currents, given as follows: i1(t)=I1 cos(ωt+ϕ1) and i2(t)=I2 cos(ωt+ϕ2

viktelen [127]

Answer:

120.51·cos(377t+4.80°)

Step-by-step explanation:

We can use the identity ...

sin(x) = cos(x -90°)

to transform the second waveform to ...

i₂(t) = 150cos(377t +50°)

Then ...

i(t) = i₁(t) -i₂(t) = 250cos(377t+30°) -150cos(377t+50°)

A suitable calculator finds the difference easily (see attached). It is approximately ...

i(t) = 120.51cos(377t+4.80°)

_____

The graph in the second attachment shows i(t) as calculated directly from the given sine/cosine functions (green) and using the result shown above (purple dotted). The two waveforms are identical.

8 0

4 years ago

Maria bought a bag of flour so that she could make muffins. It has a mass of 2.26 kilograms. She needs 450 grams of flour to mak

wel

Step-by-step explanation:

1 kg = 1000g

2.26kg = 2260g

Kilograms left = 2260 - 450 = 1810g

1810g or 1.81kg will be left

4 0

3 years ago

The area of the irregular polygon is ____ square units.

vova2212 [387]

15 square units. Its right

4 0

4 years ago

Rose walks 2 2/3 km in three-fifths of an hour. If her speed remains unchanged, how many kilometres can she walk in one and thre

mr_godi [17]

Answer:

Distance = 7 7/9 Km

Step-by-step explanation:

Given the following data;

Distance = 2⅔ = 8/3 Km

Time = ⅗ hour

First of all, we would find her speed;

Speed = distance/time

Speed = (8/3)/(3/5)

Speed = 8/3 * 5/3

Speed = 40/9 km/h

Next, we would find the distance covered when time = 1¾ hours

Distance = speed * time

Distance = 40/9 * 1¾

Distance = 40/9 * 7/4

Distance = 10/9 * 7

Distance = 70/9

Distance = 7 7/9 Km

7 0

3 years ago