Let a = log take 3 as the base, 3.14 as the true number, B = log take 2 as the root, 3 as the true number, C = log take 3 as the root, 2 as the true number, then the size relationship of a, B, C If a, B, C are all compared with 1, then a > 1, B, C are all less than 1?

A = log3 3.14 > log3 3 = 1, B = log2, root 30, so b > C, so a > b > C

Log27 ^ 4 * log8 ^ 9 + 2log4 ^ 9 - 4 is going to crash

Using the formula of changing bottom:
log27^4*(log8^9+2log4^9)-4
=lg4/lg27*(lg9/lg8+2lg9/lg4)-4
=2/3lg2/lg3*(2/3lg3/lg2+2lg3/lg2)-4
=2/3lg2/lg3*8/3lg3/lg2-4
=16/9-4
=-20/9

A rectangular steel has a bottom area of 1.5 square decimeters and a length of 5.2 meters. If each cubic decimeter of steel weighs 7.8 kg, how many kg does this steel weigh?

A rectangular steel has a bottom area of 1.5 square decimeters and a length of 5.2 meters. If each cubic decimeter of steel weighs 7.8 kg, the steel weighs (628.4) kg
Length = 5.2m = 52dm
The volume is: 1.5 × 52 = 78 cubic decimeter
Weight: 7.8 × 78 = 608.4kg
I hope you can make progress in your study!
If you have any questions, please ask. If you have any help, please adopt it. Thank you!

PEP eighth grade volume I English 10 pages 2D original

Jack:Hi ,Claire,are you free next week?
Claire:Hmm...next week is quite full for me,Jack.
Jack:Really?How come?
Claire:I have dance and piano lessons.
Jack:What kind of dance are you learning?
Claire:Oh ,swing dance.It ‘s fun!I have class once a week,every Monday.
Jack:How often do you have piano lessons?
Claire:Twice a week,on Wednesday and Friday.
Jack:Well ,how about Tuesday?
Claire:Oh ,I have to play tennis with my friends.But do you want to come?
Jack:Sure!
I'm in eighth grade, too
Here is the translation
Jack: Hi, Claire. Are you free next week?
Claire: Well Next week will be quite busy for me, Jack
Jack: really? What's the matter?
Claire: I have dance and piano lessons
Jack: what kind of dance are you learning?
Claire: Oh, it's swing dance. It's fun! I have classes once a week, every Monday
Jack: how often do you have piano lessons?
Claire: twice a week, on Wednesdays and Fridays
Jack: Well, what about Tuesday?
Claire: Oh, I'm going to play tennis with my friends. So are you coming?
Jack: of course!

There are 7 white balls in the bag and 24 yellow balls. If the ratio of white balls to yellow balls in the bag is 5:3, how many white balls need to be added?

How many feet is 90 cm converted into ruler

1 foot = 30.48 cm
90cm = 2.95ft (two decimal places reserved)

A number is odd, a multiple of 5, a two digit number, and the sum of all factors is 48

35
First of all, he's odd
It's divisible by five and equals seven, so it's a multiple of five
The factor of 35 is 1.57 35, and the sum of four of them is 48

The difference between a and B is 9. If one sixth of a is equal to 25% of B, then a is?
fast

Let a be x, then B be X-9
X/6=(X-9)*25%
X/6=X/4-9/4
Multiply both sides by 12
2X=3X-27
-X=-27
X=27
The number one is 27

How much sodium hydroxide and water are needed to prepare 500 ml 10% sodium hydroxide solution (density is 1.1 g / cm3)?

To prepare 500ml (500cm3) sodium hydroxide solution with 10% mass fraction, the mass of sodium hydroxide is 500cm3 × 1.1g/cm3 × 10% = 55g; the mass of water is 500cm3 × 1.1g/cm3-55g = 495G. A: the mass of sodium hydroxide and water are 55g and 495G respectively

Sixth grade people's education press Volume 1 unit 1 mathematics test paper

People's education press grade one volume one mathematics unit 7 test paper
PEP sixth grade volume I mathematics unit 6 test paper

Let a = log take 3 as the base, 3.14 as the true number, B = log take 2 as the root, 3 as the true number, C = log take 3 as the root, 2 as the true number, then the size relationship of a, B, C If a, B, C are all compared with 1, then a > 1, B, C are all less than 1?