All categories

3 years ago

Round each factor to the nearest ten to estimate the product of 34 . 39

Mathematics

1 answer:

aev [14]3 years ago

3 0

Answer:

Round 34 down to 30 then round 39 up to 40

Step-by-step explanation:

34 ⟶ 30 34 is rounded down to 30

39 ⟶ 40 39 rounded up to 40

34 ⟶ 30

39 ⟶ 40

34 is rounded down to 30

39 rounded up to 40

Calculate mentally 34 × 39 = 1326

The estimated product is 1326.

You might be interested in

If the zeros of f(x) are x=-1 and x=2, then the zeros of f(x/2) are

RSB [31]

Answer:

E (-2, 4).

Step-by-step explanation:

(x/2 + 1)(x/2 - 2) = 0

x/2 = -1, x/2 = 2

x = -2, 4.

The roots will be 2 times the roots of f(x).

6 0

3 years ago

Read 2 more answers

Question 8b , thanks

marta [7]

Answer:

Step-by-step explanation:

$a = \frac{2b+1}{3b-1}$

b = 2/3

$2b + 1 = 2*\frac{2}{3}+1\\\\=\frac{4}{3}+1\\\\=\frac{4}{3}+\frac{3}{3}\\\\=\frac{7}{3}\\\\3b-1 = 3*\frac{2}{3}-1\\\\=2- 1 = 1\\\\\\$

$a = \frac{2b+1}{3b-1}\\\\a=\frac{\frac{7}{3}}{1}\\\\=\frac{7}{3}\\\\$

a = 7/3

$\frac{2b+1}{3b-1}=a\\\\$

Cross multiply,

2b + 1 = a*(3b - 1)

2b + 1 = a*3b - 3*a

2b + 1 = 3ab- 3a

2b = 3ab - 3a - 1

2b - 3ab = -3a - 1

b(2 - 3a) = -3a - 1

$b =\frac{-3a - 1}{2 - 3a}$

3 0

3 years ago

A DVD has a diameter of 26 centimeters. What is the area of the DVD? Round your answer to the nearest hundredth. Use 3.14 for π.

Alinara [238K]

Answer:

A =530.66 cm^2

Step-by-step explanation:

A DVD is a circle so we can use the formula for area of a circle

A = pi r^2

We can find the radius from

r = d/2 where d is the diameter

r = 26/2

r = 13

A = pi *13^2

A = pi *169

Substituting in for pi

A = (3.14) * 169

A =530.66

7 0

3 years ago

A cylindrical container has a base area of 100 m2 and is 12m high. if the container is one-third filled with water, what's the v

docker41 [41]

Volume of water= $\frac{1}{3}*BA*H$
V= $\frac{1}{3} *100 m^{2} *12m$
V= $400m^{3}$

5 0

3 years ago

Look at pic and solve

Brilliant_brown [7]

Answer:

Yes it can be solved.

Step-by-step explanation:

I did this stuff in like 4th grade lollll

5 0

3 years ago